企业要发展，必须要有创新精神，不断推陈出新。

And let's be clear: It's not enough just to limit ads for foods that aren't healthy. It's also going to be critical to increase marketing for foods that are healthy.

Gratitude turns what we have into enough.

数学不知道种族或地理边界；对于数学来说，文化世界是一个国家。