Prepleuron
前側片
??? 情景例句
That's where our difficulty lies.
那就是困難所在。
To blow smoke rings
噴出煙圈
There had been fuel on the ship, but this did not appear to have caused the fire, and little smoke was produced.
很顯然，船艙里已經發生了一場烈火，但是船艙內壁卻完好無損。船上存放著汽油，但火災似乎不是它引起的，因為沒有冒出什么煙來。