永远不要让自尊心妨碍你做正确的事。
The Internet is the most important single development in the history of human communication since the invention of the printing press.
我们的教学方法只有一个,就是必须维持孩子们的高度兴趣和强烈持续的注意力。
Oil and gas will remain part of the energy mix for decades to come, but we must produce them as cleanly as possible.