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。

Optimism is a strategy for making a better future. Because unless you believe that the future can be better, you are unlikely to step up and take responsibility for making it so.

I am not a storyteller, but a story-maker.

Sustainability isn't a trend; it's a responsibility we owe to future generations.

你总统领导不了是因为我。

我相信最好的表演来自于真实和诚实的地方，而不是试图打动任何人。