run in
phrasal verbrun somebody in
- (old-fashioned, informal) to arrest somebody and take them to a police station
把某人扭送警察局
run something in
- (British English) (in the past) to prepare the engine of a new car for normal use by driving slowly and carefully
磨合运转；磨合驾驶 - (figurative) Whatever system you choose, it must be run in properly.
不管你选择什么样的体系，都必须经过适当的磨合。
- (figurative) Whatever system you choose, it must be run in properly.