Be careful you don't trip up on the step.

你小心别在台阶上绊倒了。

《牛津词典》

What they trip up on is actually a more difficult conceptual problem, the time travel paradox.

让他们在这个问题上屡屡犯错的实际上是一个更为困难的概念问题，一个关于时间穿梭的矛盾。

youdao

Ms Stoddart argues that American companies often trip up on data-privacy issues because of "their brimming optimism that the whole world wants what they have rolled out in America."

斯图达特女士认为，美国公司经常在数据隐私问题上犯错，因为“他们的满怀乐观地认为全世界都需要他们在美国业已推出的新玩意。”

youdao

He had been on the first exploratory trip to the mountain that had mapped the way up from the southern side.

VOA: special.2010.06.30

We continue on our trip, driving on a winding road up and down the Black Mountains.

VOA: special.2010.08.23

A storm blew up on the return trip to Milwaukee.

VOA: special.2009.11.11

Other changes that could trip up taxpayers on their 2010 returns are also related to recent, temporary changes Congress has made in the name of stimulating the economy or salvaging the housing market.

FORBES: Mistakes To Avoid On Your 2010 Tax Return

We will be making a trip up to Doncaster on Friday by plane in order to cut travelling time down.

BBC: Clive Stuart-Smith column

Talbert stocked up on goods on that first trip and has since returned a dozen times.

FORBES: 5 Second-Act Careers To Sail Through Retirement