live in the present
1.Present 作为名词有两个意思。A present 意思是礼物。The present 是此时此刻。在你告诉某人应该 live in the present 的时候意思是要生活在此时此刻，集中在眼前的事情，不要管过去或将来。
2.示例：
Don't worry if your former boyfriend cheated on you. Live in the present and find another person to love!
别担心你前男友是不是绿了你，活在当下去找另外一个。
Johnny was keen to save money to buy a house. His friends told him to live in the present and go on a holiday with them.
Johnny很急着存钱准备买房。他的朋友们告诉他要及时行乐，多享受下现在，出去旅游。
值得注意的是，英语短语 there's no time like the present 意思是没有理由去推迟谋事，应该立刻行动。
You've always wanted to visit your cousin in France. There's no time like the present! Go and buy a ticket now to fly there tomorrow.
3.引申：
功夫熊猫的乌龟师傅的名言:
There is a saying, that yesterday is history, tomorrow is mystery, but today is a gift, that is why it's called the present.