Without oil, its navy could not leave port, its aircraft could not fly.

没有石油，海军无法离开港口，飞机也不能飞。

youdao

Oil is necessary for ships to sail and aircraft to fly.

石油是让船和飞机的起飞所必需的。

youdao

Oil is necessary for ships to sail and aircraft to fly.

石油是让船和飞机的起飞所必需的。

youdao