我思考历史的重量。

The heart of the Waldorf method is that education is an art—it must speak to the child's experience. To educate the whole child, his heart and his will must be reached, as well as the mind.

The only secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards.

可持续发展不再是可选项；对于任何负责任的矿业公司来说都是必需品。