Their after-sales service was just so bad that I decided to never buy anything from that shop again.
他们的售后服务太差了,所以我决定从此不再能家商店买东西。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现,就可以探究一下声音在什么情况下有绝对的实用价值。