该管弦乐队一直在刻苦排练演奏霍尔斯特和斯特拉文斯基的作品。The orchestra's been swotting up their Holst and Stravinsky.要想精通英语就必须刻苦努力.To gain a complete mastery of English, one must study very hard.确保成功的惟一途径是刻苦努力.The only ladder to assure success...
Once the dust had settled Beck defended his decision.事态一旦平息，贝克就为他的决定辩白。Matt defended all of Clarence's decisions, right or wrong.克拉伦斯的决定，不管对错，马特都予以维护。Why had Hilton defended him so ardently?为什么希尔顿如此激动地为他辩护呢？...
These chromosomes are so simple that some geneticists prefer to call them chromonemes.这些染色体结构简单,许多遗传学家喜欢称它们为染色丝.Geneticists believe that man's physical fitness has been degraded.遗传学家认为人类的体能一直在退化.Geneticists only rec...
General Goring spoke for about two hours.戈林将军的发言持续了大约两个小时.Always do they talk that way with their arrogance before a goring.他们挨牛角之前,总是这样吹大牛.GORING. My dear Robert, it's a very awkward business, very awkward indeed.(...
Its metallation and addition to cyclopentanone proceeded well to 40.其金属取代物能和环戊酮顺利地反应得到40.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.以单质碘为催化剂合成了环戊酮乙二缩酮.Methyl dihydrojasmonate was synthesized fro...