/frɒθ; [US] frɔ:θ; frɔθ/
n [U]
1 mass of small bubbles, esp on the surface of a liquid; foam 泡（尤指液体表面上的）; 泡沫
*I don't like beer with too much froth. 我不喜欢泡沫太多的啤酒.
2 (derog 贬) light but worthless conversation, ideas, etc 空洞的交谈、思想等
*Their chatter was nothing but froth! 他们聊天儿没别的, 全是废话!

v
1 [Tn, Tn.p] ~ sth (up) cause (a liquid) to foam 使（液体）起泡
*froth (up) a milk shake 将含奶的饮料打起泡沫来.
2 [I, Ipr] have or produce froth 有泡沫、起泡沫; 发泡; 冒泡
*The water frothed as it tumbled down the rocks. 水冲击在岩石上溅起了泡沫.
* Animals with rabies often froth at the mouth. 患狂犬病的动物常常口吐白沫.
* (fig 比喻) He was so angry he was almost frothing at the mouth. 他气得差点儿口吐白沫.