Mechanical efficiency
[机] 机械效率
🧩 词语组成解析
🗣️ 情景例句
since her mother died.
因为她妈妈去世了。
We can't get good pictures on our TV set.
我们的电视机图象有问题。
or through hiring it, the total expense can be far less than the cost of hotels.
总费用算起来要比住旅馆开支少得多。