1. It has often been remarked that the saddest thing about youth is that it is wasted on the young.
    人们常常说: 对于青春来说，最令人悲伤的事情莫过于青春在年轻时被浪费掉了。

2. From early youth he had cultivated it by memorizing verses in an unfamiliar tongue.
    从年轻时代起，他故意用一种人们不熟悉的外国语（例如希伯莱语），背诵它的诗篇，以锻炼自己的记忆力。

3. Fuelled by the immense value attached to youth, it has made millions out of vacant promises of renewing faces and bodies.
    青春具有巨大的价值，这大大刺激了美容业，使其得以从它的那些使我们面容、身体焕然一新的空洞许诺中赚了数百万元。