虽然无法改变过去，但可以改变未来。

Then it was that Margaret, sitting alone with tears dropping often on her work, felt how rich she had been in things more precious than any luxuries money could buy—in love, protection, peace, and health, the real blessings of life.

Every decision we make today ripples across the marine ecosystem for decades.

Mathematics is the poetry of logical ideas.

The people who are crazy enough to think they can change the world are the ones who do.