I do not know much about it, but I think some of America's best young men served in this war.
我对这场战争了解的不多,但我知道美国的很多年轻人都参与了这场战争。
"A story has no beginning or end: arbitrarily one chooses that moment of experience from which to look back or from which to look ahead."
制造链式反应机器的基本点当然是确保每次裂变产生一定数量的中子,其中一些中子再次有效地产生裂变。
森林的真正价值不仅在于其木材,还在于其维持生命的能力。