If it were not for this, they would run on the rocks.

如果没有灯塔，他们会撞上岩石。

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There are only a limited number of tests that scientists can run on the rocks, and their results remain murky.

科学家们也只就有限数量的的岩石进行过测试，并且结果仍然是不明朗的。

youdao

There are only a limited number of tests that scientists can run on the rocks, and their results remain murky.

科学家们也只就有限数量的的岩石进行过测试，并且结果仍然是不明朗的。

youdao