单词：blueshift
blueshift的用法和样例：
例句
- The speeds of cars are far too small for us to notice any redshift or blueshift.再次以汽车为例子，汽车的速度太小了以至于我们很少注意它的红移和蓝移。
- The animation below schematically shows what a redshift and blueshift might look like, again using a car as an example.下面的动画显示了红移或蓝移看上去的可能样子。
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