running in
US /ˈrʌnɪŋ ɪn/
UK /ˈrʌnɪŋ ɪn/
短语动词
1.
磨合, 试运行
to break in a new engine or vehicle by driving it carefully at moderate speeds for a period of time
示例:
•
You need to spend some time running in the new car before driving it at high speeds.
在新车高速行驶之前，你需要花一些时间磨合。
•
The mechanic advised me to run in the engine for the first 500 miles.
机械师建议我在最初的500英里内磨合发动机。
2.
跑进来, 冲进来
to enter a place quickly or unexpectedly
示例:
•
The children came running in from the garden when it started to rain.
下雨时，孩子们从花园里跑进来。
•
He suddenly ran in and announced the good news.
他突然跑进来宣布好消息。