Different species can't breed, apart from some exceptions like lions and tigers, or donkeys and horses.
* 不同的物种不能繁育后代，除了一些例外，如狮子和老虎之间，或驴和马之间。
* apart from ...：除了、除…以外
* species ['spee-sheez, -seez]['spiːʃiːz] n. 种类；（单复同）物种
* breed [breed][briːd] v. 繁殖；养育
* exception [ik-'sep-shuhn][ɪk'sepʃn] n. 例外；不合规则
* donkey ['dong-kee]['dɒŋki] n. 驴
What stops species from producing offspring and what's the biggest species separation that can produce offspring?
* 是什么阻止了（不同）物种之间繁衍后代？能繁衍后代的最大物种大小差异是多少？
* offspring ['awf-spring, 'of-]['ɒfsprɪŋ] n. 后代；子孙；产物
* separation [sep-uh-'rey-shuhn][ˌsepə'reɪʃn] n. 间隔，差异
Picture the information that is given from the mommy tiger and the daddy donkeys like zippers.
* 想象一下老虎妈妈和驴爸爸的情况，就像拉链一样。
* mommy ['mom-ee]['mɒmi] n. 妈咪，妈妈
* daddy ['dad-ee]['dædi] n. <口>爸爸
* zipper ['zip-er]['zɪpə] n. 拉链
Tiger zippers have really big teeth like a snowsuit.
* “老虎拉链”的齿非常大，例如雪地服（的拉链）。
* teeth 原型：tooth [tooth][tuːθ] n. 牙齿；这里指拉链咬合的一个个小齿状物；
* snowsuit ['snoh-soot]['snəʊsjuːt] n. 孩童用防雪装
Donkey zippers have really small teeth like those on a delicate piece of clothing.
* “驴子拉链”的齿则真的非常小，就像那些精致衣服上的拉链锯齿一样。
* delicate ['del-i-kit]['delɪkət] adj. 精美的；精致的
If you try to zip the one side of the snowsuit to the other side of the delicate clothes it just won't go.
* 如果你试着把雪地服的一边拉链与精致衣服的另一边拉链拉合，它就是拉不动。
* zip [zip][zɪp] v. 拉拉链
If the two zippers were similar enough though - like a horse /donkey or lion / tiger... they may just fit.
* 而如果某两个拉链足够相似，例如像马和驴，或者狮子与老虎……，它们可能正好合适。
* fit [fit][fɪt] v. 适合；适宜
Not perfectly but they might fit.
* 不太完美，但可能适合。
* perfectly ['pur-fikt-lee]['pɜːfɪktli] adv. 无瑕疵地；完美地
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