n.浮渣，泡沫，糟粕vi.产生泡沫，被浮渣覆盖vt.将浮渣去除掉...

under no circumstances的音标：...

Cumbrian的音标：...

cirrocumulus的复数形式为：cirrocumuli...

When they are on holiday the work of doctors is often done by locums.医生度假时,他们的工作常由代理医生负责....

v.浮渣( scum的第三人称单数 )，卑鄙的人，人渣，社会渣滓...