飞行员在浓雾中失去了方向感。

The pilot lost his ___bearings in the thick fog.

到了新学校后，他花了一周时间才熟悉周围环境。

It took him a week to get his ___bearings at the new school.

风扇的轴承需要定期润滑以减少摩擦。

The fan's ___bearings need regular lubrication to reduce friction.