The concept of a particle is only an approximation, valid in certain limiting cases.
粒子的概念只是一种近似,仅在特定极限情况下有效。
再说,义就是匡正的意思,不能以下正上,必须是以上正下。
The dairy industry must adapt to changing consumer preferences.
Every life is a story, and every story is a life.
Keep an open mind, accept different opinions.
对于有知识的人来说,言语是最好的展示。
机遇青睐有准备的头脑。
Wealth should not be concentrated in the hands of a few, but should be distributed among all through fair competition.