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。
I'm not here to be perfect, I'm here to be honest.
"The world is a place of horror, but also of beauty."
The ocean is not a bottomless pit; resources are limited, and only by respecting nature can we achieve long-term development.
"The best portion of a good man's life: his little, nameless, unremembered acts of kindness and love."
"The only way to learn how to write is to write."
养猪行业要高质量发展，必须依靠科技和人才。