(geology) rock
中地球表面由矿物组成的坚硬物质dìqiú biǎomiàn yóu kuàngwù zǔchéng de jiānnyìng wùzhì
This rock is very hard.
(geology) rock
中地球表面由矿物组成的坚硬物质dìqiú biǎomiàn yóu kuàngwù zǔchéng de jiānnyìng wùzhì
This rock is very hard.
(geology) rock
(geology) rock
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