by-your-leave

基本解释

We the people of Poland, when the country was enslaved by the time, is the right to leave your own country. -- Mrs. Curie.
我们波兰人，当国家遭到奴役的时候，是无权离开自己祖国的。襊—— 居里夫人。
www.268r.com.cn
It is important to notice that, if your baby react to some certain juice by diarrhea or vomiting, leave and wait for some another one-month and then try again.
重点提醒是，如果你的宝宝因为喝了某种饮料而腹泻或者呕吐，要记住迟点或者等一个月后再试喝。
If you can't bear to leave your sports news at home, sign up for "ESPN Alerts" by text message and download small-screen videos.
如果您想在离开家的时候也能收看体育新闻，那么您可以发送手机短信订阅“ESPN新闻通报”并下载电视录像。

you could leave your response to the invitation slightly open-ended by saying you're not sure.
你可以表示你不确定，开放性地回复这个邀请。
I don't know 课堂 - SpeakingMax英语口语达人

To try to effect a political federation of such disparate nations and cultures with hardly a by-your-leave of the people most directly affected is preposterous and ultimately self-defeating.
FORBES: Fact And Comment