If you ask why, you might not get a particularly good answer, or maybe a hand waving in the direction of digestion.

如果你问为什么，你可能得不到一个特别好的答案。

I scanned the crowd, feeling oddly self-conscious, secretly convinced that nobody would come, but there he was, his huge hand waving above the shifting bodies around him.

我扫视着人群， 有一种奇怪的难为情， 暗暗相信没有人会来，但他就在那里， 他的大手在他周围移动的身体上方挥舞着。