用紫外分光光度法研究了胶原生物矿化的机理.The mechanism of collagen mineralization was studied by ultraviolet photometry method.单细胞 无核原生物,具简单的细胞、刚硬的细胞壁和(能动型的)的鞭毛.A single - celled or multicellular organism whose cells contain a distinct memb...
由于农村的工厂纷纷裁员，人们逐渐流向城市。As rural factories shed labour, people drift towards the cities.我在地图上勾勒出这条河的流向。I traced the course of the river on the map.这条小河弯弯曲曲缓慢地流向大海。The stream meanders slowly down to the sea....
It gave a metallic clang, like a cracked bell.它发出了金属碰击般的哐啷声，跟破钟似的。He pulled the gates to with a clang.他把大门咣当一声带上了。The iron gate was pulled to with a clang.铁门哗的一声拉上了....
Some employers reneged on agreements once the recession set in.经济一衰退,有些雇主就违背了协议.Both had reneged on paying off the loan.两人都违背了还清贷款的诺言.The management agreed to raise the workers'pay, but they reneged on their word.资方...