operate properly 正常运转
Shortly after 1400, shipbuilders began developing a new type of vessel properly designed to operate in rough, open water: the caravel.
1400年之后不久，造船工人开始开发一种新型的船，这种船设计合理，可以在开阔的水面上航行：它就是卡拉维尔号。
Some of the staff in the stores "can't even operate computers properly or tell you all the functions of the mobile phone," he said.
他说那些商店的一些店员“甚至不能正确的操作电脑或者向你介绍手机的所有功能”。
The lift doesn't operate properly.
这台电梯运转不正常。
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