如果有人谴责你是世界上最懒的生物时,你完全可以用Sloths这种生物来为自己开脱。没错,树懒!真的是非常懒。认识树懒很简单树懒应该是科、属、种最为简单的生物种类之一,而且在全球尚存的数量也不多了,所以如果有机会的话,看看这个奇怪的生物吧。树懒科包括三趾树懒(Bradypus)和二趾树懒(Choloepus)两个属,每属因分类体系不同而各有一至数种,共6种。三趾树懒前后肢均三趾,二趾树懒后肢三趾而前肢二趾。 If someone denounces you as the laziest creature in the world, you can use the Sloths creature to justify yourself. Yes, sloth! Really very lazy. Knowing the sloth is very simple Sloth should be one of the simplest species of genus, genus and species, and there are not many surviving species in the world. So if you have a chance, take a look at this weird creature. Sloth families include the two genus Bradypus and Choloepus, each of one to several species, six in total, depending on the classification system. Three-toed sloth before and after the hind limbs are three toes, two-toed sloth hind limbs toe and forelimb two toes.