一心二用

to do two things at once (idiom) / to multitask / to divide one's attention

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

wholeheartedly / heart and soul

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]

two / 2 / (Beijing dialect) stupid

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore