那些小青年甩着黑色的长发，做着各种奇怪的手势。The teenagers shook their long, black hair and gesticulated crazily.他们打着象征胜利的V字形手势。They were waving V-signs for victory.他的手势富于表现力。He moved his hands expressively....
These plants quickly form dense clumps.这些植物很快形成了浓密的树丛.I was combing my hair and it was just falling out in clumps.我梳头的时候，头发一团一团地往下掉。He worked steadily, and fast, pausing only to toss away clumps of grass roots.他平稳快速地工作着，...