如果你没有深陷其中，你怎么知道自己有多高？

"Words have power, but silence can be even more powerful."

60年代的故事，就像飞碟登陆一样。每个人都听说过，但很少有人亲眼见过。

"I like dogs. You always know what a dog is thinking. It has four moods. Happy, sad, cross and concentrating."

One day in perfect health is far better than an eternity in any other state.

塑料的真正成本不在于生产，而在于它的后续处理。

Challenges are what make life interesting and overcoming them is what makes life meaningful.

天然气是一种多功能燃料，可以在没有阳光和风的时候提供可靠性，从而支持可再生能源的增长。