There is no time like the present .

机不可失,时不再来。

there is no time like 后面加一个时间，表示没有比...更好的时候了，后面可加to do something,表示没有比...更好的时候去做某事。

There is no time like the present to talk with him.

没有比现在更好的时间去和他谈谈话了。

There is no time like Christmas to show your love to people around you.

没有比圣诞节更好的时候去向你身边的人表达你的爱。