怎么理解这个句子.Itsuddenlydawnedonmethatthisexpresswasnotroaringdownthelineatninetymilesanhour,butbarelychuggingalongatthirty.请问句中roaringdown该怎么理解.barely该怎么理解.chuggingalong该怎么

Question

怎么理解这个句子.
It suddenly dawned on me that this express was not roaring down the line at ninety miles an hour,but barely chugging along at thirty.
请问句中 roaring down 该怎么理解. barely 该怎么理解.chugging along 该怎么理解.为什么chugging 要加ING

Answer 1

roaring down是指隆隆地沿轨道驶过
barely是仅仅
chug along字面的意思就是：（火车、汽车等）嘟嘟的开着.
chug是拟声动词,指车辆行进时的咔嗒声
我突然明白这个快车并没有以九十英里每小时的速度轰隆隆地驶过轨道,而是勉强以三十的速度嘟嘟的开着.
后半段,这里chugging是与前一句的roaring并列,所以时态相同