mouth是可数名词。mouth的复数形式是mouths。
mouthn.嘴;口;需要供养的人;入口;开口;
v.(动嘴唇)不出声地说;言不由衷地说
Her mouth felt as dry as a bone.
她感到口干舌燥。
Don\'t talk with your mouth full.
不要一边吃一边说话。
She opened her mouth to say something.
她张开嘴要说什么。
水利万物而不争,
而万物莫能与之争。