Bring up in town, the boy find it difficult to separate a poplar from a willow.
那男孩是在城里长大的，所以觉得很难区别杨树和柳树。
Brought up in town, the boy finds it difficult to separate a poplar from a willow.
那男孩是在城里长大的，所以觉得很难区别杨树和柳树。
Brought up in town, the boy finds it difficult to separate a poplar from a willow.
那男孩是在城里长大的，所以认为很难区别杨树和柳树。
He is both a historical figure and a legend and it is sometimes difficult to separate the two.
他既是一位历史人物，也是一位传奇人物——有时很难将两者区分开来。
But peeling it is usually a trouble to us because it is difficult to separate the skin from pulp.
但扒橙子却一直是个长期困扰人们的问题，果肉和果品难以分离导致扒橙子的过程汁水外流。
Everyone hopes to be successful, but the success and failure as easily, it is difficult to separate.
人人都希望自己能成功，但成功与失败如影随形，是很难分开的。
Chlorobenzoic acids can be synthesized by oxidation of mixed chlorotoluene which was difficult to separate.
难分离的混合邻、对氯甲苯经氧化可制得混合邻、对氯苯甲酸。
There commonly exist pyrite minerals in coal-bearing strata in one region, but it is difficult to separate.
某地区煤系地层中普遍产出硫铁矿，但非常难选。
The construction of Alexander's life is itself problematic , for it is difficult to separate fact from legend.
建设亚历山大的生活本身就是有问题的，因为这是很难分开的事实从传说。
The lug and recess can have a slight taper, so once they are pressed in place, they will be difficult to separate.
柄和休息能有一个微小的小腊烛，因此，一经他们适当地被压，他们将会难以分开。
It is difficult to separate out each of these areas of development because they are closely linked with one another.
之所以很难把发育的各个领域单独分离出来，是因为它们彼此之间都有紧密的联系。
It is difficult to separate from niobium, the element above it in the periodic table, with which it shares many properties.
很难将它与铌分开，铌是周期表中钽的上面一个元素，两者具有许多共同的性质。
The airspace expression of an information is orderless, so it's difficult to separate the feature which we are interested in.
一种信息的空域表示，由于其空域值的无序性，人们难以直接从中分离出感兴趣的特征。
However, due to the complexity of the chemical constituents of CHMs, it is difficult to separate them on column within a short time.
由于中药化学成分的复杂性，中药成分分析一直存在着分离难度大、分析时间长等问题。
A study for leaching of a low grade and difficult to separate copper ore was performed by using ammoniacal pressure leaching method.
用加压氨浸的方法，对某低品位难选离析铜矿进行了浸出研究。
It is of nearly the same shape, size and weight as normal grains of wheat and it is exceedingly difficult to separate it by machinery.
毒麦的籽实同麦粒的大小和重量相近，很不容易进行机械清除。
Because the complexity and mutual boiling existence of pyrolysis oil, it bring out much difficult to separate and purify pyrolysis oil.
由于热解油中物质的复杂性及共沸现象的存在，给热解油的分离提纯带来了很大的困难。
It is difficult to separate errors from progress messages, so I wanted to give the user an option to control which messages are displayed.
由于难以区分错误和进展消息，因此我想给用户一个选项来控制显示哪些消息。
The old separating screen in structure is connected with the mill and immovable, so it is difficult to separate the higher viscous materials.
老式的分离筛在结构上与磨机合为一体，静止不动，很难分离黏度较高的物料。
Although, both include crocodile graphics, but it is difficult to separate graphics is a consumer to distinguish the difference between the two.
虽然，两个商标中都包含鳄鱼图形，而且单独的图形很难使消费者区分两者之间的区别。
Oily sewage has the characteristics of multi-component, abundant with oil content, widely range of water quality and difficult to separate, etc.
含油污水具有成分复杂，量大面广，含油量高，水质差别大，处理过程复杂等特点。
Chemical synthesis course is simple which can be industrialized, the product is DL-enantiomer, it is difficult to separate and get rid of D-Theanine.
而化学合成法制备茶氨酸，操作相对简单，易于工业化生产，但产品多为D -、L -的混旋体，D -茶氨酸的分离与去除具有较高的技术难度。
Moreover, in specific RF electric field, the compensating voltages of two kinds of ions may be close to each other and it is difficult to separate and identify them.
另外，在特定的射频电压条件下，两种物质的补偿电压可能会非常接近，为两者的分离和识别造成了困难。
But because of the restrictions on minor vascular structures and image resolution, It is difficult to separate. Therefore, 3d reconstruction of the flap is a problem.
但由于血管的细微和图像分辨率的限制使分割成为困难，所以对于皮瓣的三维重建是个难题。
It is very difficult to separate completely international law and national law 's own legal. The demarcation line between international law and national law is becoming smudgy.
国际法和国内法各自的法律规范已很难截然分开，国际法与国内法之间的界限正在变得模糊不清。
Ahrysophanol and physcion are effective anthraquinones in rhubarb, but it is difficult to separate than other anthraquinones because of resemble structure and close characters.
大黄酚和大黄素甲醚是大黄中有功效的蒽醌类成份，由于两者结构相似，酸性与极性相近，往往难以分离。
Because ethanol and isopropyl alcohol is difficult to separate, the orthogonal experiment design is used to define the best operation parameter and to obtain the optimization resolution.
通过前期试验发现乙醇和异丙醇的分离较难，所以运用正交实验设计法，确定最佳操作参数，获取优化的分离度。
Because ethanol and isopropyl alcohol is difficult to separate, the orthogonal experiment design is used to define the best operation parameter and to obtain the optimization resolution.
通过前期试验发现乙醇和异丙醇的分离较难，所以运用正交实验设计法，确定最佳操作参数，获取优化的分离度。
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