1.live alone 独居
例句:She always said I ought to live alone.
她总说我应该一个人住。
2.clean up 清理
例句:I cleaned myself up a bit, and got the baby ready.
我拾掇了一下自己,把宝宝也收拾妥当。
3.pick up 捡起;获得
例句:Where did you pick up your English?
你在哪儿学的英语?
4.at a cost of 花费;...的代价
例句:The new shopping centre was constructed at a cost of 1.1 million.
新的购物中心耗资110万建成。