个中

gè zhōng zī wèi

个中滋味

the feeling of something

gè zhōng bì yǒu yuán yīn

个中必有原因。

There are some reasons behind it.

gè zhōng kuàng wèi zhǐ yǒu qīn lì cái néng lǐ huì

个中况味，只有亲历才能理会。

Only people who have actually experienced it can understand how it feels.

wǒ zhī dào gè zhōng ào miào

我知道个中奥妙。

I know the secret of it.