The sheep dog protects the sheep from danger.

牧羊狗保护羊群不受危害。

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Both the big sheep and the small sheep were very excited.

大羊和小羊都非常兴奋。

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The big sheep and the small sheep were tired, hungry and thirsty.

大羊和小羊都很疲倦，饥饿和干渴。

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Yet animals like sheep or goats can provide a biological control -- they eat weeds.

VOA: special.2009.05.26

This is Virgil: "He should sing thin - spun lays and he should be content feeding his fat sheep."

这是维吉尔的诗：“他哀唱着纤细的抒情诗“,“喂着肥硕的羊儿，他无比满足“

耶鲁公开课 - 弥尔顿课程节选

Look at line 119: Blind mouths! that scarce themselves know how to hold A Sheep-hook, or have learn'd aught else the least That to the faithful Herdman's art belongs!"

看一下第119行：,妄言之口！他们甚至不知如何掌控,愚钝之人，从未经受过学识的洗礼,文艺只属于虔诚的牧人！

耶鲁公开课 - 弥尔顿课程节选

Sheep were targeted in 1792 - which became known as the Year of the Sheep - following clearances in Sutherland and Easter Ross.

BBC: Artist 'lectured' sheep on Highland Clearances

There will be no tungsten sheep-fleece, but sheep in future will grow not just more wool, but softer wool.

ECONOMIST: Non-food GM

That never got in the way of a good PR-grabbing, sheep-baiting headline of course.

FORBES: Nouriel Roubini Wrongly Compares Gold To Y2K Tech Bubble