Sometimes one pays most for the things one gets for nothing .(Albert Einstein , American scientist )
有時候一個人爲不花錢得到的東西付出的代價最高。
(美國科學家 愛因斯坦. A.)
If you would go up high , then use your own legs ! Do not let yourselves carried aloft; do not seat yourselves on other
There is no royal road to science ,and only those who do not dread the fatiguing climb of gaining its numinous summits