时间像沙漏一样穿过瓶颈
[shí jiān xiàng shā lòu yī yàng chuān guò píng jĭng]
Time slipping through a bottleneck like sand trickling through an hourglass is a way to express that time flows steadily no matter what happens, and the period when everything seems narrow or challenging will eventually pass as it always does with the passage of time.