最美好的事，是看到某人的微笑；更美好的事，是TA因你而微笑。The most beautiful thing is to see a person smiling. And even more beautiful is, knowing that you are the reason behind it.怀疑某人的动机to impeach sb's motives维护某人的利益to safeguard a person...
溴、氯阳离子化合物的数量受局限.The number of cationic bromine and chlorine compounds is restricted.溴化反应较不易发生.Bromination takes place less readily.溴化烷可以这样形成.Alkyl bromides can be produced this way....
我将派儿子去取书.I'll send my boy round to collect the book.妈妈派哥哥去取行李.Mother sent my brother for the luggage.他们派他去取报纸.They sent him out to get the newspaper....
Other early instruments included the sextant and the astrolabe.另外的早期仪器还有六分仪和星盘.The drum is one of the oldest musical instruments.鼓是最古老的乐器之一。Telescopes and microscopes are optical instruments.望远镜和显微镜是光学仪器.She conducted an...