I would like to send this by registered mail, please.
我想把这封信挂号寄出。
I'm the youngest boy in my team.
我是我的那一队伍中最年轻的男孩。
but as soon as a the question of prestige arises, as soon as you feel that you and some larger unit will be disgraced if you lose, the most savage combative instincts are aroused.