It is difficult to separate legend from truth.
传说与事实很难分辨。
Indeed, pain and itch have been difficult to separate.
实际上，疼痛和瘙痒一直以来都很难分开。
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 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。
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。
Many mixture which are difficult to separate by other methods can be separated by chromatography.
许多用其他方法很难处理的混合物可以利用色谱法进行很好的分离。
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。
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。
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。
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。
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。
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。
For the granule oil-bearing wastewater that is difficult to separate, a new device of air dissolution releasing column is developed based on the air dissolution floatation and column floatation.
针对含油废水中难分离的细粒级油分，结合溶气气浮技术和柱浮选技术的优点，提出利用溶气析出式浮选柱处理含油废水。
For the granule oil-bearing wastewater that is difficult to separate, a new device of air dissolution releasing column is developed based on the air dissolution floatation and column floatation.
针对含油废水中难分离的细粒级油分，结合溶气气浮技术和柱浮选技术的优点，提出利用溶气析出式浮选柱处理含油废水。
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