Each disaccharide is composed of two monosaccharides.每一种双糖都是由两个多糖组成.Disaccharide A SUGAR with molecules composed of two monosaccharide units.二糖:两个单糖单位由糖苷键连接起来形成的糖类.Cellulase An enzyme that hydrolyzes 1, 4 - glycosidic li...
An aquifer is a water - bearing rock stratum such as sandstone and chalk.地下蓄水层是一些有水的岩石层,如沙岩和白垩岩....the corruption that pervades every stratum of the country...渗透到社会各阶层的腐败An aquifer is a water-bearing rock stratum such as...
Some shoppers looked bewildered by the sheer variety of goods on offer.光是摆在那里的各式商品就让一些购物者晕头转向了。"I was once as bewildered as you are," she said meaningfully.“我曾经和你一样迷惑，”她意味深长地说。He took the bewildered Elliott by the arm an...
Drugs are a problem that requires constant vigilance.需要对毒品问题长期保持警惕。Never relax your vigilance while you live in peace.你们要居安思危.Constant vigilance is necessary in order to avoid accidents.为了避免意外事故,必须经常保持警惕....
我们需要各方面的帮手：工程师、科学家（例如地质学家）和教师。We need helpers of all types, engineers, scientists (e.g. geologists) and teachers.查理？噢，他是个不可多得的好帮手，非常喜欢孩子。Charlie? Oh, he's a treasure, loves children.这种电池充电器是摄影工作者的好帮手。This battery bo...