思索

wǒ méi shuì yī zhí sī suǒ zhe zhè ge wèn tí

我没睡，一直思索着这个问题。

I lay awake all night, turning the problem over and over in my mind.

tā sī suǒ zhe tā de lùn jù

他思索着她的论据。

He reflected over her argument.

wǒ zài sī suǒ zěn me shuō zhè ge wèn tí

我在思索怎么说这个问题。

I tried to think how to phrase the question.

kǔ kǔ sī suǒ

苦苦思索

think deeply

rèn zhēn sī suǒ

认真思索

ponder earnestly

yòng xīn sī suǒ

用心思索

do some hard thinking