a baby's development in the womb胎儿在子宫内的发育The baby's head was starting to emerge from the womb.婴儿的头开始从母亲的子宮中露出来.A scan determines the position of the baby in the womb.扫描可以确定胎儿在子宮中的位置....
Cuprous oxide is a type of material called a semiconductor.氧化亚铜是一种所谓的半导体材料.Tin free , polishing antifouling composition with cuprous oxide.含氧化亚铜的无锡自抛光防污涂料.Cuprous oxide and zinc oxide can be recovered from waste copper c...