历史原因很简单——机械设计多年以来一直是制造企业的一大要素。

The historical reason here is simple – mechanical design was a key element of manufacturing for many years.

youdao

坚韧是成功的一大要素，只要在门上敲得久、声够大，终会把人唤醒。

Tenacity is a major factor of success, just knock on the door long enough and loud enough, would eventually pull wake.

youdao

坚韧是成功的一大要素，只要在门上敲得够久、够大声，终会把人唤醒的。

Diligency is a key factors to be successful. As long as you knock at door long and loud enough, someone will answer it.

youdao