One caution, though.

一个谨慎，虽然。

youdao

There is nothing like frequent failure for teaching one caution.

什么东西也不象经常的失败更能教育人们小心谨慎。

youdao

One caution though, avoid planning a strict itinerary, you need to be flexible and able to change plans when travelling with children.

虽然需要谨慎，但也要避免制定一个严格的行程，你和孩子旅行时需要一个灵活的、可变的计划！

youdao

I think the genius of this parable hinges on the fact that the servant who was only given one talent seems to be acting so perfectly reasonably - with a laudable form of caution and hesitation, you could actually say.

我认为这则寓言的特别之处在于,那个只拿到一个金币的仆人,的行为是很合理的,-可以说是令人称赞的小心和犹豫。

耶鲁公开课 - 弥尔顿课程节选

My one caution would be on individual stocks you have that are under water.

FORBES: Should You Take A Tax Loss In December?

One caution: when flimsy narrative superstructure begins to sag, anarchic wackiness can grow wearing.

ECONOMIST: American fiction (2)

One caution: If you're audited, you'll need to show support for your estimates.

FORBES: Depreciate It