酒桶滚下山坡，红酒洒了一地。

The wine ___barrel rolls down the hill, spilling red wine everywhere.

这辆坦克的炮管很长。

The tank has a long ___barrel.

这家炼油厂每天能处理十万桶原油。

The refinery can process 100,000 ___barrels of crude oil per day.

那辆卡车失控地冲下山坡。

The truck was ___barreling uncontrollably down the hill.