Thespeeds of neutrons are slowed down by the graphite core.

石墨堆芯降低中子速度。

youdao

We could already hear the graphite core in Sade's voice, a grainy contralto full of air that betrays a slight ache but no agony, and values even imperfect dignity over a show of pain.

我们已经能听出沙黛嗓音中石墨般的质地，她那亚光型的女中音充满着气息，透露出一丝隐痛，却并无苦楚，置哪怕是不完美的尊严于展览痛苦之上。

youdao

The control rods are in fact placed outside of the core. What you also see in this design is that there's graphite, a lot of graphite which is the graphite reflector for this core.

控制棒事实上是在核心的外边，你们能在这个设计中看到的是，这有石墨，很多的石墨，那就是核心的石墨反射物。

youdao

In the same way, the pattern of holes in a crystal fibre can create the equivalent for light of a graphite core and a diamond cladding.

ECONOMIST: A new approach to making optical fibres