在觀測天文學(xué)中，耐心是關(guān)鍵，有些發(fā)現(xiàn)需要幾十年才能確認(rèn)。
To this day, I have never taken a course anywhere, in chemistry, economics, psychology, or business.
一個民族的活力與他們所生活的氣候能量有關(guān)。
The secret of improved plant breeding, apart from scientific knowledge, is love.