a lumpy mattress的用法和样例：
- He could feel the thin, lumpy mattress.
- "Good-bye, father," said Tess, with a lumpy throat.
- A lumpy gay who sitted in front of me shouted: "割包皮！！！"I was shot.
- For coffee in Chile means a sachet of Nescafe and tepid water producing a lumpy gloop of extraordinary vileness.
- Among these patients, 23 had a lumpy throat, and the remaining 5 had a oice alternation.