一曝十寒

one day's sun, ten days' frost (idiom, from Mencius); fig. to work for a bit then skimp / sporadic effort / lack of sticking power / short attention span

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

to air / to sun

ten / 10

cold / poor / to tremble