"I thought that it is best that I should withdraw and go back to South Africa so that I do not become a stumbling block myself," said Ramaphosa.

他说：“我认为我最好退出这个斡旋小组，返回南非，这样我就不会成为绊脚石。”

youdao

The hours you waste stumbling over your piled debris, picking, washing, storing, re-storing, those are hours and spaces that you will never get back in a mortal lifetime.

不要把时间浪费在整理乱七八糟的东西以及挑选，洗涤，储藏，在储藏上，因为这些将是你有生之年不能在寻回的时间。

youdao

An aching back sent me stumbling to the drugstore for relief.

背疼使我跌跌撞撞去药店减轻痛苦。

youdao

Morales nearly sent Hernandez to the canvas in the ninth with a left jab with Hernandez stumbling back a few steps before regaining his balance.

BBC: SPORT | Boxing | Morales proves too good

While these people were close enough to understand the challenge, they weren't so close that their knowledge held them back, causing them to run into the same stumbling blocks that held back their more expert peers.

WSJ: Jonah Lehrer on How to Be Creative

He's referring to the stumbling block of Federal Communications Commission regulations dating back to the 1970s that prohibit newspapers from owning broadcast outlets in the same town.

FORBES: Where's Dean?