I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.
Future agriculture must be high-tech agriculture, and aquaculture is no exception.
儿童的进步不是取决于年龄,而是取决于能够自由地观看他周围的一切。
中国的崛起是21世纪最重要的地缘政治事件。