I began helping a family in the Karoo Desert in the 1970s turn the desert that you see on the right there back to grassland, 20世纪70年代我开始帮助一个在卡鲁沙漠的家庭，你们看到在右边沙漠变回了草地， and thankfully, now their grandchil

Reagan Ladies and Gentlemen, I'd planned to speak to you tonight to report on the state of the Union, but the events of earlier today have led me to change those plans. Today is a day for mourning and

If we can make this point that I'm making 如果我们能够做出这些论点，我说这些， to powerful men and women in our society 是对于全部有权力的男人和女人在我们的社会中， at all levels of institutional authority and power, 在各阶层的有权力人物， it'

On spring days like today, it is traditional for us to ponder the steer of the world all you are to help to make it a better place which implies things are somehow worse today, then we're up here

And every single part of this mechanism is actually plausible in biology. 实际上，这个机制的每一个步骤在生物领域中都是可行的。 In other words, I've taken off-the-shelf components, and I've made a spectroscope. 换句话讲，我用现成的部件做成了一