单词：for this once
只这一次
for this once的用法和样例：
例句
用作副词(adv.)
- In itself this was not a catastrophic turn.就这件事本身而论，还不算是一次灾难性的变化。
- It's just this one time, I told myself as I quickly scribbled Heather's answers.当我迅速地涂上希瑟的答案时，我跟自己说，就这一次。