The progress of science is not a straight line, but a series of zigzags, sometimes seeming to go backward before a new advance is made.
科学的进步不是一条直线,而是一系列曲折,有时在新的进展之前似乎会倒退。
Precision agriculture is not a luxury; it's a necessity for feeding the world sustainably.
真实不是可知的,但是它是可体验的。
勇气不是没有恐惧,而是战胜恐惧。
儿童是通过努力从事活动,从而使个人得到发展的。