Don't tie [put on] your shoes in a melon patch or adjust your hat under a plum tree -- avoid being suspected.; Don't do anything to arouse suspicion.

瓜田不纳履， 李下不整冠。

《新英汉大辞典》

Tom Moses, who works at a nearby national park, noticed a "brown patch" on the back of the car after the owner parked it to do some shopping.

在附近一个国家公园工作的汤姆·摩西，在车主停车去买东西的时候，注意到那辆车后面有一块“棕色斑点”。

youdao

Our dog has a bald patch on its leg.

我们的狗腿上脱了一片毛。

《牛津词典》

They gathered hundreds of sea creatures and water samples to measure the garbage patch's effect on ocean environment.

VOA: special.2009.09.22

Austan Goolsbee spoke on Fox News Sunday: "It is going to be a rough patch not just in the immediate term, but for a little bit of time ".

VOA: standard.2009.06.07

Update your PC once a month as soon as Microsoft releases the patches (on Patch Tuesday, the second Tuesday of every month).

FORBES: Six Simple Steps Proven To Keep Your Windows 7 PC Safe From Hackers And Malware

But if AOL can break one promise on Patch, why not another?

FORBES: AOL Earnings: Revenue Turns Positive, But Patch Disappoints. Bad Omen For Hyperlocal?

This I call a patch on top of a patch.

CNN: How the Israelis do airport security