A floating marker anchored in water to guide or warn.

锚定在水中的浮标，用于导航或警示。

A ring-shaped float used to rescue someone from drowning.

圆形救生圈，用于在落水时施救。

To keep something afloat or maintain it at a high level.

使某物保持漂浮，或维持在较高水平。

To cheer or encourage; to lift someone’s spirits.

鼓舞、打气；提升某人的士气。