It's difficult to keep track of the slick, says co-pilot Brian Boland.

VOA: standard.2010.07.05

And then now they've put in a centre de memoire, sort of a memory site there, that's kind of slick but it's fine.

现在他们造了一个回忆中心,算是一个供人回忆的地方,有点假不过还行

耶鲁公开课 - 1871年后的法国课程节选

The oil slick has now entered the loop current that runs from the Gulf of Mexico to the Florida Keys and up the east coast of the U.S., Jarvis said.

VOA: standard.2010.05.26