tā / de / xīn / sī / shēn / bù / kě / cè / dà / jiā / dōu / cāi / bú / tòu / tā / zhēn / zhèng / de / xiǎng / fǎ

他的心思深不可测，大家都猜不透他真正的想法。

His thoughts are unfathomable, and no one can figure out what he really thinks.