Then, before I knew it, I tripped on something and suddenly I was on the icy pavement, my knees smacking onto the hard concrete.

然后，在不知不觉中，我被什么东西绊倒了， 突然间我在结冰的人行道上， 我的膝盖撞在坚硬的混凝土上。

When I see a flower coming from a very hard concrete crack, I was wondering why the small flower has such a big, large energy to come out.

龚：当我看到一朵花从一个非常坚硬的混凝土裂缝中开出时，我在想为什么小花会有这么大很大的能量开出来。