Fruits, such as apples and pears, have inedible cores that contain seeds.

水果，比如苹果和梨，果核不可食用，里面含有种子。

Stars like our sun fuse hydrogen in their cores into helium.

太阳一类的恒星在其核心将氢聚变成氦。

I have only these three cores and these skins.

我只有这三颗果核和这些果皮。

At first he made a wry face, but, one after another, the skins and the cores disappeared.

一开始他做了个鬼脸，但是，一个接一个，果皮和果核都消失了。

You have to use those cores.

您需要使用这些内核。

It will be 4, 6, or 8 cores.

它可能是4、6或8个内核。