帮助:汉译英

what cannot be called back is yesterday, what can be held is today, what can be filled with hope is tomorrow. no matter it is yesterday, today or tomorrow, keeping an active mood is the key to (mastering) the future.

Looking back is not yesterday, to capitalise on that today, tomorrow is full of hope, regardless of yesterday, today and tomorrow, and maintain the mentality of the young will be able to grasp the future

The one that can't turn one's head was at yesterday, that held is today carefully, the promising one was tomorrow, no matter at yesterday, today and tomorrow, can hold future once keeping the young psychology.