The engine started quickly,to my relief,but loudly,roaring to lif_英语解答

The engine started quickly,to my relief,but loudly,roaring to life and then idling at top volume.
to my relief何意?
roaring to life
and then然后?

人气：248 ℃　时间：2020-09-23 07:00:13

解答

就是发动机很快点燃了我松了口气
roaring to life 是指发动机运转启动滴声音很大
然后就那样轰轰地空转着