Now I would like to show you a few slides, and I might as well cover this up so that we get it very dark in this room.
给你们看几张幻灯片，我顺便遮掉这个,这样教室就变暗了。
2
The dark background was in strong contract with the previous two slides.
上一张幻灯片中黑暗的背景与之前的彩色背景形成了鲜明的对比。
3
As his mother and others have learned, it's not always prudent to compete. he turns into a dark drive with a chain-link fence that slides open as the Lexus approaches.