"Living pigments" is a metaphorical device to refer to the fact that the pigments of the original paint have been replaced by pigmented micro-organisms.

“活颜料”是个比喻，意味着绘制岩画最初使用的颜料已被画作表面微生物取代。

youdao

The fact that I've called it X, is really just a programming — it's a feature of the programming language that I, the human, can now refer to it.

事实是我叫它为x，它实际上只是一个程序-，它是程序的一个特写，我们可以参考使用它。

youdao

The reason this misconception has come about is most likely due to the fact that in Middle English, the word “apple” was used to refer to all fruit and nuts (except berries).

这个误解形成的原因可能是中世纪英语中“apple”一词指的是所有水果和坚果（除了浆果）。

youdao

The Ministry of Defence (MoD) refer to the fact that almost 23, 000 service personnel are discharged each year, most of whom settle successfully in the community and go on to a successful civilian life.

BBC: [an error occurred while processing this directive]

Bush did not refer to his own role, if any, in the operation, not even to refer to the fact that he caused the war that forced Saddam to flee into a hole in the ground in the first place.

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And, again, I would refer you to the fact that we are reviewing and implementing actions with great haste.

WHITEHOUSE: Press Briefing