有证据表明，人类的捕猎和栖息地的破坏可能是导致当前物种大量灭绝的原因。
Evidence points to hunting by humans and habitat destruction as the likely causes for the current mass extinction.
黑层段是大洋缺氧造成的结果，生物大量灭绝，深层水具旋脊有孔虫的所遭受的危机反映出当时海洋深层水体严重缺氧的特征；
The black unit including a biotic extinction was caused by oceanic anoxic event. Crisis that deepwater keeled foraminifera encountered represents a ferocious anoxia in deep marine environment .
我相信你们都意识到了大量物种面临灭绝这个令人担忧的情况。
I am sure you're all aware of the worrying situation with a large number of species facing extinction.
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