They may be wise to err on the side of caution.

他们宁可失之过于谨慎也不冒风险也许是明智的。

《柯林斯英汉双解大词典》

Yet appearances can deceive, ecologists caution, and many of these exotics may be considered acceptable only because no one has documented their harmful effects.

然而，生态学家警告说，这些表象可能并不是真的；而且，这些外来物种中有许多可能被认为是可接受的，只是因为没有人记载过它们的有害影响。

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We are of the opinion that great caution should be exercised in dealing with this matter.

我们认为处理这事应该非常谨慎。

《牛津词典》

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。

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While the "slippery slope" argument can, and ought to, be a legitimate cautionary policy tool, the invocation of the slippery slope argument can be its own form of slippery slope and must be applied with a large measure of caution.

CENTERFORSECURITYPOLICY: Center For Security Policy

"I think there's going to be continued caution in terms of hiring, " Mr. Stanley said, pointing to looming political battles in Washington that will cause some companies to postpone expanding.

WSJ: Economy Adds 157,000 Jobs

However, Dr King said the benefits had to be weighed with caution against known adverse effects of drinking alcohol and it would not be advised in some people such as those with liver problems or cancer.

BBC: NEWS | Health | Alcohol 'quickly' cuts heart risk