But a second approach is to breed countermeasures into the sheep themselves.

但第二种方法是在绵羊体内培育对策。

Wheat, maize and rice all started life as wild grasses, which we've bred into crops.

小麦、玉米和大米最初都是野草，我们把它们培育成了农作物。

Over thousands of years, farmers bred these wild ancestors into foods like corn and eggplant, that we would recognize today.

几千年来，农民把这些野生祖先培育成玉米和茄子之类的食物，直到今天我们才认识到它们的存在。

McKenna was from a large working-class Pittsburgh family, and bred into his bones was a steeliness that he cloaked with charm.

麦肯纳来自匹兹堡的一个工人阶级大家庭，外表的魅力掩盖了他骨子里的冷酷坚韧。

She said a lot of the qualities being bred into the French bulldog are connected to its appearance, not its health.

她说，法国斗牛犬的许多特质都与它的外表有关，而不是它的健康。

So there are some instincts that we've bred into dogs over the generations, which tend to come out now.

所以有一些本能是我们几代人培养到狗身上的，现在往往会出现。

It basically brings a whole " New Foundland" of possibilities turning every terrier into a " sky terrier" and every breed into a working one.

它还带来了一种新的可能性，那就是将每一只猎犬变为“空中猎犬”，使每一品种都有机会成为工作犬。

Sure the first specimens were just plain ordinary tulips, but they could be bred into some extraordinary variations, like that dark purple tulip.

当然， 最初的标本只是普通的郁金香，但它们可以培育成一些非凡的变体，比如深紫色的郁金香。

In fact, the scientists are actively using the bank to breed genes for drought resistance into cultivated tomatoes — protecting food sources not only for desert rodents but for us.

事实上，科学家们正在积极地利用这个基因库为栽培的西红柿培育抗旱基因——不仅保护了沙漠啮齿动物的食物来源，也保护了我们的食物来源。

While the feline actions of your house cat Grizmo might seem perplexing, in the wild, these same behaviors, naturally bred into cats for millions of years, would make Grizmo a super cat.

你的猫的行为看上去可能让你困惑，而在野外，这些行为，经过百万年的自然进化，足以让 Grizmo变成一只超级猫。