Insecurity might creep in.

不安全感可能会悄然而生。

《柯林斯英汉双解大词典》

Mistakes were starting to creep in.

不知不觉间，开始出错了。

《牛津词典》

I would creep in and with stealthy footsteps explore the second floor.

我会悄悄溜进去，轻手轻脚地看一下二楼的情况。

《柯林斯英汉双解大词典》

Referring to mission creep in Afghanistan, Byrd went on to question the need for 30,000 to 40,000 additional troops requested by the U.S.and NATO commander General Stanley McChrystal.

VOA: standard.2009.10.15

Frustration began to creep in with both sides, manifesting itself in increasingly rash challenges.

BBC: Leeds ride luck in Rome

Remember that companies voluntarily file information with a credit bureau and clerical errors may creep in.

FORBES: Magazine Article

The words "repetitive and formulaic", "lack impact" and "should be more topical" creep in rather a lot.

BBC: Churning up the chamber but how?