昨天已是过去，明天还是未知,今天才是最真实，所以我们要把握今天，期待明天，不忘昨天. 大虾位帮忙翻译英

Yesterday is past, tomorrow is a mystery, today is real, so we should grasp today, expecting tomorrow and not forgeting yesterday
希望能够帮到楼主

1. Yesterday has passed while tomorrow remains unknown. Nothing is more real than today. That is the very reason that we should make full use of today, look forward to tomorrow and never drive yesterday out of mind.

2. Yesterday has passed while tomorrow remains unknown. Only today is real. Therefore, we should grasp today, expect tomorrow and never forget yesterday.

(If you have any doubts, don't hesitate to put them to me.)