ㄎㄞㄗㄨˊㄇㄚˇㄌㄧˋkāizú‑mǎlì

开足马力
  1. 速度高限比喻竭盡全力 汽船開足馬力飛馳」、大家開足馬力工作」。

to accelerate at full power (idiom)​; at full speed, fig. to work as hard as possible