míng / zhī / duì / shǒu / zhǔn / bèi / chōng / fèn / tā / hái / yào / dān / dú / yíng / zhàn / jiǎn / zhí / shì / yǐ / luǎn / jī / shí

明知对手准备充分，他还要单独迎战，简直是以卵击石。

Knowing that his opponent was well prepared, he still chose to face him alone, which was completely reckless.