Gold and silver, like other commodities, have an intrinsic value, which is not arbitrary, but is dependent on their scarcity, the quantity of labour bestowed in procuring them, and the value of the capital employed in the mines.
黄金和白银，像其他商品一样，具有内在价值，这不是任意的，而是取决于它们的稀缺性、获取它们所耗费的劳动量以及在矿山中使用的资本价值。
And your friends will be properly astonished to see you laughing as you look up at the sky! Then you will say to them, "Yes, the stars always make me laugh!"
一本书是作者与读者之间无限的对话。
"A writer's duty is not to provide answers, but to ask the right questions that provoke thought and reflection."
天文学中的精确测量为理解宇宙打开了新的窗口。
Every decision we make about ocean resources today creates ripples that will affect generations to come.
At the close of our studies， we knew all the past of physics， but nothing of the present and the future.
"Fiction is the lie through which we tell the truth."