- 别有用心 biéyǒuyòngxīn to have an ulterior motiveto have a hidden or secondary agenda, usually implying a negative or dishonest intention.
- 用心良苦 yòngxīnliángkǔ to give much thought to somethingto ponder earnestly or take great pains; to give a lot of thought to something with deep intentions
- 良苦用心 liángkǔyòngxīn to give much thought to somethingto ponder earnestly or take great pains with one's intentions and planning
- 无所用心 wúsuǒyòngxīn to not give serious thought to anythingnot paying attention to anything; to be indifferent or to idle one's time away without engaging the mind
- 饱食终日,无所用心 bǎoshízhōngrìwúsuǒyòngxīn to remain idle and do no work(idiom) To eat one's fill all day long and do no work; to be sated with food while having nothing to occupy one's mind.
- 应用心理学 yìngyòngxīnlǐxué applied psychologyThe branch of psychology that uses theories and principles to solve practical problems in real life.
- 用心竭力 yòngxīnjiélì attentively and diligently(idiom) to exert one's heart and strength to the utmost; to do something with full concentration and effort
- 不用心 bùyòngxīn inattentivenot paying attention; careless or lacking in focus; not putting one's heart into a task