在局部地方白云石和硬石膏也是重要的胶结物;还有少量自生石英.Locally dolomite and anhydrite are important as cements , together with minor authigenic quartz.钱存在银行,利息自生.Money deposited in banks will accrue to us with interest.两种环境下形成的自生矿物组合截然不同.Authige...
An earthworm is a terricolous organism.蚯蚓是陆生的生物.The earthworm population had declined by 70 %.蚯蚓数量下降70%.The oral opening in an earthworm is small.蚯蚓的口是很小的....
让我们从群居性开始谈犬的行为。Let's talk about dog's behavior from the point of gregariousness.雪雁是群居性鸟类。Snow geese are very gregarious birds.海豚是一种群居性动物,会通过尖叫声和呼噜声相互沟通.Dolphins are social animals that communicate with each oth...