果实成熟期,甜瓜在有机生产体系中生物量较高,但两种体系的市场产量差异不显著。
The 19th century is a mature period of educational theory in the western history.在西方教育思想史上,19世纪是西方近代教育理论趋于成熟的时期。
A person's youth period after a, can appear as beautiful as autumn the mature period.一个人的青春时期一过,就会出现像秋天一样优美的成熟时期。