许多石油工人正在讨论如何应对国际油价波动。

Many ___oil workers are discussing how to deal with international oil price fluctuations.

这些油轮定期往返于中东和亚洲之间运输原油。

These ___oilers regularly shuttle between the Middle East and Asia to transport crude oil.

这台老式发动机需要定期给润滑点加油以防止磨损。

This old engine requires regular oiling of its ___oilers to prevent wear.