pull your socks up

请看一个爸爸对儿子说的话：

Son, I attended the Parents' Meeting today in school. Your teacher says you are not doing well. In fact, your grades were going down over the past few months. You can't surf on your smart phone anymore. I think you have to pull your socks up and catch up with other kids as soon as possible.

attend   出席/参加

grades   成绩

surf on your smart phone    玩手机

pull your socks up    振作起来，加油干/拼命加油

catch up with   赶上来

as soon as possible    尽快

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Son, I attended the Parents' Meeting today in school. Your teacher says you are not doing well. In fact, your grades were going down over the past few months. You can't surf on your smart phone anymore. I think you have to pull your socks up and catch up with other kids as soon as possible.