Full sentence: The career of fruits is noble, the career of flowers is sweet, but let us do the career of leaves, which humbly and attentively hang their green shades.

It means that although fruits are noble, how can there be fruits without flowers?

Although flowers are beautiful, how can there be flowers without leaves?

Let us do Ye’s career, because Ye’s career is ordinary and humble

In general, it is to do our job humbly, which is what we are talking about now. People who applaud on the roadside