“只一次，”他说，“玩笑开在了我身上。而且那并不是很有趣。”

"For once," he said, "the joke's on me. And it's not very funny."

《柯林斯英汉双解大词典》

还有另一首完全不同的情绪的诗，“只一次，便成永远。”

Also, in a very different mood, the poem "For Once, Then, Something."

youdao

并且不用山羊和牛犊的血，乃用自己的血，只一次进入圣所，成了永远赎罪的事。

Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.

youdao

You can't just say it once. You have to try to fill that void by saying it two times and by invoking his father a third time.

你不能只讲一次，你必须说第二遍,并且第三次提到迪安的父亲，来填补中间的空隙。

耶鲁公开课 - 1945年后的美国小说课程节选

I first tested it on the square root of 4 and in one iteration it found 2.

我首先测了下求4的平方根4,它只迭代了一次并返回了2。

麻省理工公开课 - 计算机科学及编程导论课程节选

Also, in a very different mood, the poem "For Once, Then, Something."

还有另一首完全不同的情绪的诗，“只一次，便成永远“

耶鲁公开课 - 现代诗歌课程节选