飛機引擎是種複雜的機械裝置英文怎麼說？

An airplane engine is a complex mechanism.

這種新的開關裝置尚未經過充分檢驗英文怎麼說？

This new switch mechanism hasn't been fully tested out.

地方政府的結構還很不完善英文怎麼說？

The mechanism of local government is far from perfect.

氣象學家認為這一氣壓的突然升高是暴風雨和颶風形成的物理機制英文怎麼說？

Meteorologists believe this pressure jump is the mechanism responsible for storms and tornadoes.