dark ring meaning in English
暗环
Examples
- Accordingly, a whole series of concentric bright and dark rings will surround the central spot .
因此，环绕着中央点将会有整整一系列同心亮环和暗环。 - Thus more than 90 per cent of the light is contained within the circle bounded by the second dark ring .
这样，有90以上的光落在第二暗环所包围的圆面积之内。 - I ' ve got dark rings under my eyes from lack of sleep
我睡眠不足，眼眶都发黑了。 - Why do you get dark rings under your eyes , when you ' re tired
为什么当你疲劳的时候，在你眼睛下面会出现黑眼圈呢？ - This process is repeated annually so that the number of light or dark ring indicate the age of that part of the plant
这样的过程每年都重复，因此可以从深浅环形成的数目来推测树木的年龄。