If a logical expression is hard to understand, try transforming it.
如果一个表达式的逻辑不容易理解，则需要试着改变其形式。
If you enter an invalid expression, the text turns red.
如果您输入一个无效的表达式，其文本将变为红色。
If the line matches the regular expression, then you print out that line.
如果该行与正则表达式匹配，则打印该行。
If you introduce another for expression, the program will evaluate the Cartesian product.
如果引入了另一个for表达式，那么这个程序将对笛卡尔积求值。
If the input text matches the regular expression, what this method returns is true.
如果输入文本与正则表达式匹配，则该方法返回true。
If you look carefully at that monster regular expression pattern, you'll discover five groups.
如果您仔细研究这个可怕的正则表达式模式，您将发现5个组。
If the target is an attribute reference: the primary expression in the reference is evaluated.
如果目标是一个属性引用：引用中的主元表达式被求值。
Welcome to English in a minute. If you smell smoke, you know there is fire. Should we call the fire department every time we hear this expression?
欢迎来到一分钟英语。如果你闻到烟味，意味着那有火。当我们每次听到这个表达都要打电话给火警吗？
If the local expression of VEGF is too high, angioma develops.
但如果局部表达浓度过高，则会形成血管瘤组织。
A picture is the expression of an impression. If the beautiful were not in us, how would we ever recognize it?
照片是意念的表达。如果我们心中没有美丽的意象，我们如何能辨识它呢？
If the expression well, the teacher also please bear with me!
如果表达得不好，还请各位老师多多包涵！
This expression may actually return a DOM object if there is a single input field.
如果只有一个输入字段，那么该表达式可以返回一个DOM对象。
Value is True if the source matches against the regular expression, otherwise false is returned.
如果源与正则表达式相匹配，则值为True，否则将返回false。
What do you think should happen if I evaluate that expression?
你认为我对表达式求值的话,会发生什么？
For the individual, if only the imagination without expression, that is a disaster.
对于个体来说，若只有想象力而没有表现力，那就是灾难。
This expression means that if a friend treats you badly, they behave as an enemy.
这个短语表达的意思是，如果一个朋友对你很不好，他们就像你的敌人。
If the expression contains parentheses but no operators, there is a function here.
如果表达式包含括号，但不包含操作符，则存在一个函数。
If the expression is true, the node is added to the results.
如果表达式为true，节点就添加到结果中。
If the postfix expression was correctly formed, the stack should be empty.
若后缀表达式格式正确，那么堆栈应该为空。
If the expression evaluates to true, then milestone item is considered complete.
如果这个表达式的值为true，则表示该里程碑项目完成。
If you say, let's write out an expression for the energy.
如果你说，让我们写出能量的表达式。
If the expression identifies an element, that element must be of a simple type.
表达式标识一个元素，则该元素必须是简单类型。
But what if they are endowed with expression, limbs or actions as human being?
但是，如果它们被赋予了像人一样的表情、四肢或行为会怎样呢？
And if you make a mistake in the middle of a long expression, you have to start all over.
如果在输入一个长表达式中出了错，就得全部重来。
You can omit the braces if the method body has just one expression.
你可以在方法主体只有一个表达式的时候省略大括号。
He had an expression of resentment, as if we had made a fool of him.
他显出不满的表情，似乎我们欺骗了他。
The vacancy of his expression made me doubt if he was listening.
他茫然的表情让我怀疑他是否在听。
His face wore an absent expression, as if in deep thought.
他面上全无表情，好像在沉思一般。
Her expression is AMAZED, as if seeing something so beautiful it can never be explained.
她露出惊异的表情，仿佛看到了某种溢于言表的美丽景象。
Her expression is AMAZED, as if seeing something so beautiful it can never be explained.
她露出惊异的表情，仿佛看到了某种溢于言表的美丽景象。
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