我们必须避免出现20世纪80年代那样具有破坏性的繁荣萧条交替循环的局面。We must avoid the damaging boom-bust cycles which characterised the 1980s.这是完善循环的最低限度人数.That is the minimum number necessary to complete the circuit.人类对硫循环的影响一直是很可观的.Man's effect ...
The petrel came winnowing in from afar on the sea.海燕从遥远的地方振翼飞来.He is winnowing wheat now.他现在正在簸小麦.Fitful gusts came winnowing through the smells of many distant fields.不定的风吹来,含带着许多远野的香气....
September is here, bringing with it a chill in the mornings.9月到了,早晨已有了寒意.He left the company by mutual consent last September.去年9月，经双方同意，他离开了公司。New owners will have to wait until September before moving in.新业主要等到9月份才能入住。...
A proton is an elementary particle of matter.质子是物质的基本粒子。an elementary English course基础英语课程Their course of study includes elementary hygiene and medical theory.他们的课程包括基础卫生学和医疗知识....