The Dutch-speaking (green) and French-speaking (red) communities are starkly divided, linked only by a smaller cluster representing users in Brussels.
2
物理中速率和速度的概念,是泾渭分明的。
There is a very big difference in physics between speed and velocity.
3
人类基因图谱显示，世界各地人种的DNA是连续的，并不像错误假设的那样划分得泾渭分明。
The map of the human genome has shown that the DNA of human populations across the globe is a continuum, not bluntly divided as had been erroneously supposed.
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