恒温动物的

Bird is both adequate and constant temperature and oviparous vertebrate animals, in nature, birds are the most beautiful of all invertebrates appearance, the most melodious voice.a very popular animal.

鸟是两足、恒温、卵生的脊椎动物，在自然界，鸟是所有脊椎动物中外形最美丽，声音最悦耳，深受人们喜爱的一种动物。

Rana ipiens were placed in the cold (5℃)for several weeks.

在测试前我们把所有的动物恒温保存1~3周。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。