Farmers are the backbone of our food system; their knowledge and dedication must be valued.

解释：大部分茶都是寒性的，而绿茶却是温性的，体现了茶性质的差异。

It's sort of sad when you think of a kid like that going through life without a sense of humor...

过去是跟随我们的影子，但也是指引我们的光。