安全生产是红线,任何时候都不能放松。
Safety production is a red line that must never be relaxed at any time.
化学和生物学之间的相互作用让生命如此迷人。
在物理学中,真相很少是完全清晰的,在量子力学中尤其如此。
When we speak of 'meaning' a word, we are in the first instance speaking of a certain kind of act.