| 例句 |
Darwin stated that the species originate by descent.达尔文阐明了物种的起源。Climate changes threaten the continued existence of the species.气候变化对这些物种的继续生存构成了威胁。The male of the species often displays aggression during courtship.这类动物的雄性在求偶期经常表现出攻击行为。If nothing is done to save the whales now, the species will soon become extinct.如果现在不采取措施拯救鲸鱼，这一物种很快就会消失。The male of the species is less aggressive.这一物种雄性的攻击性较弱。Evolution depends absolutely on the survival and reproduction of the species.进化完全依赖于物种的生存和繁殖。In some species, the phenotype and genotype of the species varies along a cline.一些物种的表现型和基因型在一个渐变群的范围内变化。The male and female of the species are also separable by their colour.这一物种的雄性和雌性可按颜色区分开来。Illegal hunting is threatening the survival of the species.非法狩猎正威胁到物种的生存。The male of the species has darker feathers.该物种雄性的羽毛颜色更深。He is studying the levels of divergence between the species.他正在研究物种间的差异水平。The male of the species is typically smaller than the female.这一物种的雄性一般要比雌性小一些。At first it seemed the attempt to save the species was a lost cause.起初拯救那一物种的尝试似乎是注定不会成功的。 |