一只雌性熊猫通常只有一个孩子，而且野生熊猫要生双胞胎也不容易。
One female panda usually has only one baby, and it is not easy for wild pandas to have twins anyway.
在雌性瓢虫的一生中将产下多达2000枚的卵。
In its lifetime, a female ladybug will lay as many as 2, 000 eggs.
例如在雌雄异株物种中的雌性植物和雄性植物，气生的和被水浸没的叶片，生活史中的配子体与孢子体的交替，叶肉和维管束鞘叶绿体等。
Examples include male and female plants in dioecious species aerial and submerged leaves alternation of gametophyte and sporophyte stages of a life cycle and mesophyll and bundle-sheath chloroplasts.
雌性食蚁兽通常一年生一个崽子。出生后的几周内，它都骑在妈妈的背上。
Female anteaters usually give birth to only one baby a year. It rides on the mother's back for several weeks after it is born.
双胞胎平平和安安分别是雄性和雌性。他们是由欢欢在2005年5月2日生的。平平和安安是目前中国健在的年龄最大的狮子虎了。
Twin ligers Ping Ping and an an, a male and a female, were delivered by Huan Huan on May 2, 2005. They are now the oldest surviving ligers in China.
雄性和雌性海象都长獠牙——不过是一生都在生长的犬齿。
When in human form, his head resembles that of a large owl with canine teeth.
雄性和雌性海象都长獠牙——不过是一生都在生长的犬齿。
When in human form, his head resembles that of a large owl with canine teeth.
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