Sure, I can help you with that. Here's a speech on cherishing time:
Ladies and gentlemen,
Time is the most valuable asset we have. Once it's gone, it's gone forever. Every moment we spend is a moment we can never get back. That is why we should cherish time more than anything else.
We should make the most of every moment. Time is not a renewable resource, so we can't waste it. Every second counts. The more we cherish time, the more we will get in return.
Let's not waste our lives. Let's make every moment count. Let's cherish time, because time is life.
That's all for my speech. Thank you.

勤劳珍惜时间的英语小故事：

达尔文如何珍惜时间

According to Darwin's wife Emma recalls that Darwin was writing "The Origin of Species," a book, often days and nights without sleep, there is no more than five hours a night, in his seriously ill, dying, we still adhere to observe and record the growth of plants, Until two days before death, none of interruption.