I don't need a reason to be unstoppable.

可持续性还不够——我们需要再生。

The coldest winter I ever spent was a summer in San Francisco.

The Internet is a powerful tool for education, but it is not a substitute for the teacher.

领导力意味着今天做出艰难的决定，明天将惠及所有人。

I am convinced that the substitution of a simple tax on the rent of land for the complicated taxes which at present oppress industry would be advantageous to all classes.