他成为旧的苏联体制直言不讳的抨击者。He became an outspoken opponent of the old Soviet system.旧的花草水果市场已开始求售了。The old flower and fruit market has been put up for sale.新的9英镑，旧的3英镑。They cost nine pounds new, three pounds secondhand....
每种动物都有自己的生态位.Each animal has its ecological niche.生态位: 生物体所占据生境的最小单位.Niche: Smallest unit of a habitat that is occupied by an organism.生态位战略之二是生态位分离和生态位扩充战略.Second niche strategy is niche separation and niche expansion s...
This often includes inflammation of the gums, which is called pregnancy gingivitis.常见有牙龈炎, 称之为妊娠期龈炎.In early stages, gum disease is known as gingivitis.在早期, 牙龈疾病被称为牙龈炎.Objective To compare the therapeutic effect of Iodop...