1.let alone 更不用说

例句:He did not have enough money to have the tire patched up, let alone buy a new one.
他的钱还不够补这个轮胎，更别提买个新的了。

2.look after 照顾

例句:We'll help you look after your finances.
我们将会帮您理财。

3.compared with 与...相比

例句:He's a pygmy when compared with great musicians.
他和伟大的音乐家相比就成了侏儒。

4.remote areas 偏远地区

例句:Landslides have cut off many villages in remote areas.
滑坡使边远地区的许多村庄与外界隔绝。