Move downward by gravity; drop.

在重力作用下向下移动或掉下。

Decrease in amount, value, or level.

数量、价值或水平降低。

Happen on a particular date or day.

在某个日期或日子发生。

Become, often in a negative state.

变得，进入某种状态，常为负面。

Be defeated or collapse.

被击败或崩溃。

A downward drop or act of falling.

向下跌落的动作；一次下跌。

Autumn; the season between summer and winter.

秋天；夏季与冬季之间的季节。

A waterfall; a cascade.

瀑布；从高处落下的水流。