世界上最好和最美丽的东西是看不见甚至摸不到的 - 它们必须用心去感受。
"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart."
The land we quarry is not ours to own, but ours to steward.
激光对于阿秒物理学的意义,就像望远镜对于天文学的意义一样。