英和和英

名詞

running in (uncountable)

1. The operating of a new engine (especially that of a motor vehicle) at less than its normal speed until proper working has been established.
   • 1960 June, “British cars go by rail: I-The L.M.R. wins new Anglo-Scottish traffic”, in Trains Illustrated, page 335:

     [...] moreover, there are times of pressure when, to expedite deliveries, cars may be driven in what should otherwise be the running-in period at speeds that do them no good - and over long distances too.