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...
The price of vegetables fluctuates according to the weather.蔬菜价格随气候波动.The price of vegetables fluctuates seasonally.蔬菜的价格随季节变动.Interest rate generally fluctuates in a cyclical manner.利率常以周期方式浮动。...