型钢辊式矫直压弯挠度的计算一直难于得出适用工程的解.
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O _ 2~ ( ·-) is relative difficult to be studied because of its short life.
因O_2~ ( · - ) 寿命极短,对其研究相对困难.
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当这世界, 尤其是社交世界太艰难的时候, 有些人就会逃入幻境之中.
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No academic discipline can take from our shoulders the burden of difficult choices.
学术薰陶不能够从我们肩上减去作出困难抉择的重负.
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It would be difficult to find a man to take the place of the present manager.
找一个人来代替现在的经理是不容易的.
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It is difficult getting back to the daily round after a fortnight's holiday abroad.
去国外度假两星期后,很难再适应日常生活的次序.
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It is difficult to set down an exact formula because cork is a natural product.
要确定脱模剂的精确配方是困难的,因为软木是一种天然产物.
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English is rich in synonyms , which are difficult for English learners to master.
英语中有大量的同义词, 是英语学习者学习词汇的难点.
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