mechanical efficiency的用法和样例：
例句
- The mechanical efficiency of this machine is very low, which leads to its failure in finishing its task every month.
这台机器的机械效率很低，每个月都完不成任务。 - The invention has simple structure, stable performance, high mechanical efficiency, large transmission power, wide application range, and low price.
本发明结构简单，性能稳定，机械效率高，传输功力大，应用范围广，价格低廉，易于推广。
