The query expression is a building block that can be assembled to define the final selection predicate for the query.
该查询表达式是一个构建块，可以通过组装它为查询定义最后的选择谓词。
That's the "TMC 2" in the regular expression toward the top of the block.
那是接近代码块顶部的正则表达式中的 “TMC2”。
The while loop, as was the case with the if statement, supports an optional else clause containing a block of program statements executed when the expression is False.
while循环与if语句一样，支持一个可选的else子句，其中包含一个当表达式计算为False时执行的程序语句块。
The second type of flow control statement in Python is the while loop, which executes a block of program statements while an expression evaluates True.
Python中的第二种流控制语句是while循环，它在一个表达式计算为True时执行一个程序语句块。
The if statement, which executes a particular block of statements based on the result of a test expression.
if语句，它基于测试表达式的结果执行一个特定的语句块。
The while loop, which executes a block of statements as long as a test expression is true.
while循环，它当一个测试表达式为true时执行一个语句块。
Because Python requires indentation to offset the block of statements that should be executed if the expression evaluates True or False, the two print statements are both indented four Spaces.
因为Python需要缩进以错开当表达式计算为True或False时应该执行的语句块，所以两个print语句都缩进了4个空格。
The arguments above specify an expression that yields a boolean value and a block of code that returns nothing (Unit), which is exactly what while expects.
上述语句指定了一个表达式，该表达式产生了一个布尔值和一个不返回任何结果的代码块（Unit），这正是while所期望的。
As in most every language, Scala's if evaluates a conditional expression, then proceeds to a block if the result is true or branches to an alternate block if the result is false. A simple example.
和大多数语言一样，Scala的if测试一个条件表达式，然后根据结果为真或假来跳转到响应语句块中。
The block runs through all the sub-elements of the root element with the name item, specified by the XPath expression //item.
这个对象遍历所有带有item名称（通过XPath表达式 //item指定）的root元素的子元素。
The if statement supports an optional else clause that indicates a block of program statements that should be processed if the Boolean expression evaluates False.
if语句支持一个可选的else子句，指示当布尔表达式计算为False时应该处理的程序语句块。
Map and grep evaluate a block or an expression for each element of a list.
Map和grep对列表的每个元素计算块或表达式。
Expression of an oncogene in a primary cell can, paradoxically, block proliferation by inducing senescence or apoptosis through pathways that remain to be elucidated.
初始细胞的癌基因的表达往往会通过诱导细胞凋亡、衰老来阻止细胞的增值的，而其实现上述功能的具体途径仍有待澄清。
But lung cancer cells sabotage the expression of these same genes to block assault from chemotherapy drugs.
不过，肺癌细胞则影响这些基因的表达，阻断化疗药物的作用。
The title block USES the abbreviation expression.
标题栏用缩写表示。
In rule definition, DM3-ADB adds temporal event, supports compound event operators, and USES DM_SQL block to define rule action, which enhances rule expression capacity greatly.
在规则定义中，DM 3 - ADB加入了时间事件，引入了复合事件运算符，采用DM_SQL语句块定义动作，大大增强了规则的表达能力。
By block diagram and feedback-control principles expression is derived for speed-stiffness in the loop and speed error due to load calculated.
并用方块图与反馈控制理论导出了这种调速回路速度刚性的数学表达式，估算了由负载引起的速度误差。
As the youngest art of printing in the world, silk screen block printing shares the same unique form of expression with copperplate etching, lithograph and xylograph.
丝网版画和铜版画、石版画、木版画有着共同的独特表现形式；丝网印刷是世界上最年轻的印刷工艺。
With the LU decomposition of the block tridiagonal matrix, an explicit expression of the block inverse elements is obtained.
由块三对角矩阵的LU分解，得到了其逆矩阵块元素的显式表达式。
The coefficient matrixes of cubic and square NURBS base functions and the expression of block matrixes of cubic NURBS surface are given.
给出了NURBS三次与二次基函数系数矩阵表示和NURBS三次曲面矩阵块表示。
The expression of environment and images is embodies in the comparison between large ink block and delicate expression of images.
运用大墨块的挥洒和精致表情刻画的对比，注重环境与人的表现。
With appropriate designing, it could block oncogene's expression, reverse MDR, and promote tumor cell apoptosis. All these properties make the Ribozymes as potentially useful regent for gene therapy.
设计合适的核酶分子能够阻断癌基因的异常表达，逆转肿瘤细胞MDR，促进肿瘤细胞凋亡，有望成为肿瘤基因治疗的有效手段之一。
"It helps prove the concept that if somehow you can block the expression of CCR5, maybe by gene therapy, you might be able to inhibit the ability of the virus to replicate," Fauci said.
Fauci说：“它帮助证明了一个概念，即如果基因治疗能阻断CCR5的表达，那就可能会抑制病毒的复制能力。”
A block diagram model and a table model for the BIT integrated expression are also proposed based on the mathematical definitions, and these two models can be directly used in engineering analysis.
在数学定义的基础上，进一步建立了BIT综合表示的框图模型和表格模型，这两种模型可以直接用于工程分析。
We examine afresh mill block —printed edition in Fukien , doing the fair evaluation to it, returning its real history facial expression, proceeding the right history fixed position.
重新审视福建坊刻本，对它做出公正的评价，还其真正的历史面目，进行正确的历史定位。
Conclusion Antisense telomerase RNA can block telomerase activity in SMMC7721 cells accompanied simultaneously with an increased P16 and P21 expression levels.
结论转染反义端粒酶RNA在封闭细胞端粒酶活性表达的同时，伴发P21与P16表达水平的升高。
For example, you can use an empty expression as the last expression in a block expression.
例如，您可以使用空白运算式做为区块运算式中最后一个运算式。
The expression of its ambiguity function is firstly presented, the block diagram of the system is given, the working principle, mathematical model and its performances of anti-jamming are analyzed.
首次给出了该随机序列的模糊函数数学表达式。给出了其系统原理框图，分析了其工作原理和数学模型，研究了它的抗干扰特性。
Then an E-pulse waveform synthesis method using Fourier series expression is proposed, as well as the principles for its parameters choice and system block diagram for E-pulse waveform synthesis.
给出了参数设计原则以及综合E脉冲波形的系统组成框图；并利用细导线散射场数据仿真了理论E脉冲和综合E脉冲目标识别性能；
Then an E-pulse waveform synthesis method using Fourier series expression is proposed, as well as the principles for its parameters choice and system block diagram for E-pulse waveform synthesis.
给出了参数设计原则以及综合E脉冲波形的系统组成框图；并利用细导线散射场数据仿真了理论E脉冲和综合E脉冲目标识别性能；
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