a mass of small bubbles in liquid caused by agitation, fermentation, or salivating
泡，泡沫，口边白沫
-
leave the yeast until there is a good head of froth. 将酵母留在里面直至一大堆泡沫冒出。
[mass noun]impure matter that rises to the surface of liquid
浮渣
-
skim off any surface froth. 撇去面上所有的浮渣。
〈喻〉 （隆起［或溢出］的）泡沫状东西
-
her skirt swirled in a froth of black lace. 她裙子上黑色的透孔花边像升腾的漩涡似的打着转。
worthless or insubstantial talk, ideas, or activities
无价值（或空洞）的谈话（想法或活动）
-
the froth of party politics. 浅薄空洞的党派政治。
form or contain a rising or overflowing mass of small bubbles
起泡沫，冒泡
-
the red blood frothed at his lips 鲜红的血沫从他的嘴唇冒出
-
[as adj.
frothing ]frothing tankards of ale. 大杯大杯起沫的麦芽酒。
〈喻〉 泛起，溢出
-
she wore an ivory silk blouse, frothing at neck and cuffs. 她穿着一件乳白色丝绸短衫，领口和袖口轻软地向四周蓬起。
[with obj.]agitate (a liquid) so as to produce a mass of small bubbles
使（液体）起泡沫。
(of a person)behave or talk angrily
（人）怒气冲冲地行事（或说话）
-
the cinema lobby frothed with indignation. 电影院休息厅里激荡着愤慨的气氛。
-
froth at the mouth emit a large amount of saliva from the mouth in a bodily seizure （疾病突然发作时）口吐白沫 -
figurative be very angry 〈喻〉 非常愤怒
"late Middle English： from Old Norse