He used to angle for prestige.他过去一贯沽名钓誉.The opened half - door was opened a little further, and secured at that angle for the time.只开了一线的门开大了一些, 暂时固定在了那个角度.Extend the telescopic antenna and adjust the angle for optimum r...
Urine is sterile.尿液是无菌的。Calcium is excreted in the urine and stools.钙通过尿液和粪便排出体外。These wastes are finally eliminated from the body in the urine.这些废物最后从尿中排出....
蜂鸟发现花蜜和花粉是很有营养的.Hummingbirds have discovered that nectar and pollen are very nutritious.为什么蜂鸟和大猩猩都有脊骨?Why do hummingbirds and gorillas both have backbones?小蜂鸟栖在山楂树枝上.The hummingbird perches on a twig of the hawthorn....