1. She used a plunger to unclog the sink.
她用一个柱塞来疏通下水道。
2. The plunger is a useful tool for removing dents in car bodies.
柱塞是清除汽车车身凹痕的一种有用工具。
3. He pushed the plunger down and the water rushed out of the toilet.
他按下了抽水马桶的柱塞，水急速冲出马桶。