HSK 7–9 · adverb · adjective
一心
wholeheartedly; with one mind; devotedly
他一心想着怎么帮助别人。
Tā yì xīn xiǎngzhe zěnme bāngzhù biérén。
He is wholeheartedly thinking about how to help others.
他一心一意地准备考试，很少出门。
Tā yìxīnyíyì de zhǔnbèi kǎoshì， hěn shǎo chūmén。
He prepares for the exam wholeheartedly and rarely goes out.