摸不透

tā de yǎn shén ràng rén mō bu tòu

他的眼神让人摸不透。

His eyes were unreadable.

tā yī zhí ràng duì shǒu mō bu tòu tā de zhēn shí yì tú

他一直让对手摸不透他的真实意图。

He kept his rivals guessing as to his real intentions.