The tie on the cystic duct may slip off.

在胆囊管上的结扎可能滑脱。

Now slip off your coat and shirt, please.

现在请脱去外套和衬衫。

I've got you on belay. I'll hold you if you do slip off.

我已帮你完成确保了，如果你真的失足，我会抓住你的。

And I'll slip off in such a way so as to impose silence.

我将会以这种方式溜走，为了赋加沉默。

Then suddenly he seemed to slip off the earth into space.

突然间，脚下一滑，米格尔感觉自已坠入到太空之中。