And while it may not look like much, 虽然看起来并不起眼 fish like Arandaspis 但像阿兰达甲鱼这样的鱼类 will one day give rise to all other vertebrates. 有朝一日 将导致所有其他脊椎动物的崛起 Amphibians, reptiles, mammals, and birds. 两栖动物、爬行动物 哺乳动物以及鸟类 But for now, vertebrates are ...
fish like Arandaspis 但像阿兰达甲鱼这样的鱼类 will one day give rise to all other vertebrates. 有朝一日 将导致所有其他脊椎动物的崛起 Amphibians, reptiles, mammals, and birds. 两栖动物、爬行动物 哺乳动物以及鸟类 But for now, vertebrates are only at the beginning 但是现在脊椎动物仍处于 of a very, ve...
will one day give rise to all other vertebrates. 有朝一日 将导致所有其他脊椎动物的崛起 Amphibians, reptiles, mammals, and birds. 两栖动物、爬行动物 哺乳动物以及鸟类 But for now, vertebrates are only at the beginning 但是现在脊椎动物仍处于 of a very, very long journey. 漫长旅程的起始阶段 Twenty ...
A backbone. 那就是脊椎 And while it may not look like much, 虽然看起来并不起眼 fish like Arandaspis 但像阿兰达甲鱼这样的鱼类 will one day give rise to all other vertebrates. 有朝一日 将导致所有其他脊椎动物的崛起 Amphibians, reptiles, mammals, and birds. 两栖动物、爬行动物 哺乳动物以及鸟类 But for now...
It has a new internal skeleton that makes it both fast and agile. 它有一种新的内部骨骼 令它既快速又灵活 A backbone. 那就是脊椎 And while it may not look like much, 虽然看起来并不起眼 fish like Arandaspis 但像阿兰达甲鱼这样的鱼类 will one day give rise to all other vertebrates. 有朝一日 将...
It hasn't yet evolved a jaw, 它尚未进化出颌 so can only suck up the scraps. 所以只能吸食残渣 But what it has evolved will change the course of history. 但它进化出的特征将改变历史进程 It has a new internal skeleton that makes it both fast and agile. 它有一种新的内部骨骼 令它既快速又...
so can only suck up the scraps. 所以只能吸食残渣 But what it has evolved will change the course of history. 但它进化出的特征将改变历史进程 It has a new internal skeleton that makes it both fast and agile. 它有一种新的内部骨骼 令它既快速又灵活 A backbone. 那就是脊椎 And while it may not...
But what it has evolved will change the course of history. 但它进化出的特征将改变历史进程 It has a new internal skeleton that makes it both fast and agile. 它有一种新的内部骨骼 令它既快速又灵活 A backbone. 那就是脊椎 And while it may not look like much, 虽然看起来并不起眼 fish like Aran...
this is Arandaspis... 这就是阿兰达甲鱼 an early kind of fish. 一种早期鱼类 It hasn't yet evolved a jaw, 它尚未进化出颌 so can only suck up the scraps. 所以只能吸食残渣 But what it has evolved will change the course of history. 但它进化出的特征将改变历史进程 It has a new internal ...
an early kind of fish. 一种早期鱼类 It hasn't yet evolved a jaw, 它尚未进化出颌 so can only suck up the scraps. 所以只能吸食残渣 But what it has evolved will change the course of history. 但它进化出的特征将改变历史进程 It has a new internal skeleton that makes it both fas...