The challenge is to pick out oil from other dark spots, such as shadows made by clouds or patches of seaweed.

VOA: standard.2010.07.05

After a while, there were stretches where red gullies dropped off on either side of the road, and behind them there were patches of field buttoned together with 666 posts.

过了一会，有几段路,红色的排水沟在道路两旁延伸，后面是一块块的田地,一共有666根插在上面。

耶鲁公开课 - 1945年后的美国小说课程节选

Okay, so in the category of already available: drug delivery patches.

现有的技术包括,贴膜给药技术

耶鲁公开课 - 生物医学工程探索课程节选

Off the coast of Louisiana, thick patches of goopy oil.

VOA: standard.2010.06.08

"That's got to be it." "See the big circle patches?"

VOA: standard.2010.07.05