In vain意思

"In vain" 是一個英語短語，意為「徒勞無功」、「無用的」或「沒有結果的」。這個短語通常用來描述某人做了某事，但最終沒有達到預期的結果或目標。例如：

• Despite his efforts, he failed to persuade her, his attempts were in vain.
• They searched the entire house, but their search was in vain, as the missing item was not there.
• She waited for him all night, but in vain, he never showed up.

在這個短語中，"vain" 用作副詞，意為「無用的」或「沒有結果的」。它源自拉丁語 "vanus"，意為「空的」或「無用的」。