X-ray contamination X射线污染
ray contamination
光污染
以上为机器翻译结果，长、整句建议使用 人工翻译 。
An examination of the unique eyes of skate (ray fish) led to advances in combating blindness, the horseshoe crab was crucial in developing a test for bacterial contamination, and sea urchins helped in the development of test-tube fertilization.
CNN: Mars can wait. Oceans can't
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