粒子的概念只是近似的,并且只有在动量较小的极限下才有意义。
外交的目标是通过对话和合作解决争端,并推动可持续的和平发展。
Man is always something more than what he knows about himself. He is not what he is simply once and for all, but is a process.
The time factor is the most important in trading. Time can turn a small profit into a large one.