Flat head rivets would reduce wind drag.

用平头铆钉可以减小风阻。

Then the moment came. I closed my eyes and loosened my grip on the string. It sliced my fingers again as the wind dragged it.

那一刻来临了。我合上双眼，松开拉着线的手。寒风将风筝拉高，线又在我手指割开一个创口。