和谐英语

经济学人下载:网络安全(2)

2020-07-31来源:Economist
1.at least 至少

He's been away for at least a week.
他走了总有一个星期吧。

2.easier said than done 说时容易做时难

Avoiding mosquito bites is easier said than done.
防蚊叮咬好说难做。