Surely it is an economic nonsense to deplete the world of natural resources.耗尽世界的自然资源毋庸置疑是愚蠢的经济行为。The contraceptive pill is the worst offender, but it is not the only drug to deplete the body's vitamin levels.避孕药的危害...
The captain of the submarine has got this periscope thing.那个潜艇艇长有个类似于潜望镜之类的东西。a furnace scanning periscope熔炉观测镜The plant is operated entirely by remote control and monitored by closed circuit television or periscope.这个工厂...