The molecules bounce off each other like two colliding billiard balls.当分子相互弹开时就象两个碰撞的弹球.A billiard - table must be perfectly even.台球桌必须十分平.The billiard ball travelled gently across the table.台球慢慢地滚过台面....
I used to snare small birds such as sparrows.我曾常用罗网捕捉麻雀等小鸟.Little sparrows fluttered among the branches.小麻雀在枝条间飞来飞去.There are many sparrows on the tree.树上有很多麻雀....
I was put on iron tablets for my anaemia.我曾因贫血吃补铁药片.The Earth is made mainly of iron and silicon and things like that...地球主要由铁、硅等物质构成。A centain iron are called lodestone would attract pieces of iron.某种称为磁石的矿石会吸引铁片.Conclu...
Bulletproof cars sheathed in armour.防弹车护有装甲.The policeman survived because of his bulletproof vest.警察因穿有防弹背心而幸免于难.Before long, they may be used in applications as diverse as surgical implants and bulletproof vests.不要多久, ...