经济学人下载:煤炭与气候变化(1)

1.phase out 逐步淘汰
They said the present system of military conscription should be phased out.
他们说现行的征兵体系应该逐步淘汰。
 

2.back up 备份
Make a point of backing up your files at regular intervals.
要特别注意定期备份你的文档。