n.[U]

1. （啤酒等的）泡沫，气泡
   a glass of beer with a lot of froth on it.

   一杯有许多泡沫的啤酒。

2. 口沫
3. 空谈[U]
   The play was little more than froth.

   这出戏只不过是些浅薄的空谈。

vi.

1. 起泡沫
   The water is frothing at his feet.

   水在他的脚下泛起泡沫。

2. 吐白沫
   A rabid dog may froth at the mouth.

   疯狗可能嘴边流着白沫。

n.

1. a mass of small bubbles in liquid caused by agitation, fermentation, or salivating.
   ▸impure matter that rises to the surface of liquid.
2. worthless or insubstantial talk, ideas, or activities.

v.