Children need to feel understood before they can change their behavior.
孩子需要先感受到被理解，才能改变他们的行为。
Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.
时间是个滑溜溜的东西：一旦失去控制，它的线索可能会永远从你手中溜走。
The most important political development of the last half century has been the spread of liberal democracy around the world.
默记所学的东西，坚持学习而不厌烦，教诲别人不知疲倦。