对于蛋白质的结晶，沉淀剂主要在溶剂上产生作用。For protein crystallization, the main impact of precipitant is on the solvent.这种蜡质属于乙醇有机溶剂的萃取物.The waxes are classed as alcohol or organic solvent extracted materials.在醇溶剂中,它不能被硼氢化物还原.It is resista...
Collins was in a foul mood even before the interviews began.柯林斯在采访还没开始时就暴躁不安起来。This material has been extracted from "Collins Good Wood Handbook".这些材料摘自《柯林斯优秀木材手册》。For details visit our website at www.cobuild.collins.co....
Several hundred soldiers have been seconded to help farmers.数百名士兵被临时派去帮助农民。The city of Chengdu lies some seven hundred miles to the South-East.成都市位于东南方大约 700 英里处。A barge was about a hundred yards away, waiting to return ...
Leona put some detergent into the dishwasher, shut the door and pressed the switch.利昂娜将一些清洁剂放入洗碗机，关上门后按了开始键。Mr. Martino's dishwasher was leaking!原来Martino先生家的洗碗机漏水了!It has a refrigerator, a freezer, an electric stov...