cusp的例句（cusp在句子中的用法）

• the cusp of a leaf 叶尖
• I am sitting on the cusp of middle age. 我将步入中年。
• Mr Short's behaviour is only on the cusp of acceptability. 肖特先生的行为勉强能接受。
• I am sitting on the cusp of middle age... 我将步入中年。