两头见不到太阳

两头不见太阳

Literally means:

never see the sun at two ends; leave home at the crack of dawn and return by starlight

Actually means:

be out from dawn till dusk; work from morning till night

To rise before sunrise and do not return from work until after sunset. Consequently, one will not be able to see the sun. This phrase figuratively means working continuously from morning till night or a job that requires working from dawn till dusk. Usually used to mean working or studying for too long during the day.

早上太阳还没有升起就起床，下午太阳落山的时候还没有休息，从早到晚都见不到太阳。比喻从早到晚不停地连续工作，也指早出晚归的工作。多指每天工作学习的时间过长。