1.I guess "someone"'s card didn't have enough money, maybe it's just a excuse, so the man say "那你还是充卡吧". It means "you can put money into your card". 2.先礼后兵here means that they use some friendly ways to make 校长( schoolmaster) to let his friend pass. But if it doesn't work, they will take some strong ways. 3.碰面, it just means she meets somebody. 4.As Jenny says, " the boy says his eyes are attractive and can produce power." Many girls are captivated by him.