2.certain adj.某, 某些
例句:A certain Mr. Brown telephoned while you were out.
你出去的时候, 有个叫布朗的先生来过电话。
The terrorists will only release their hostages on certain conditions.
恐怖分子只有在某些条件下才肯释放人质。
3.wire vt.用金属丝卷起,拍电报
4.usage n.使用, 用法
例句:Machines soon wear out under rough usage.
机器如果使用不仔细, 很快就会磨损。
5.subscription n.捐助, 订阅, 签名
例句:They decided to raise money by subscription.
他们决定靠募捐的办法来筹集这笔款子。
The club has decided to increase subscriptions.
会所决定增加报刊订阅份数。
6.transformational adj.转换的,转换生成的