134 篇文章
is actually coloured white with sulphuric acid.
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is actually coloured white with sulphuric acid. 竟然被硫酸染成了白色

They can actually sense each bat flying past.
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They can actually sense each bat flying past. 它们实际上能感觉到 每一只飞过的蝙蝠

but they could never have known that these flooded passageways were actually the beginning of subterranean rivers,
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but they could never have known that these flooded passageways were actually the beginning of subterranean rivers, 但他们从不知道这些水下通道 其实是地下河的入口

it was actually formed under water.
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it was actually formed under water. 它实际上却是在水下形成的