duck, and like them the pigeons, are endowed with steel-like muscles, that are a good part of the weight of the bird,
野鸭及它们相似的鸽子，都长着钢铁般的肌肉，占了该种鸟体重的很大一部分。
1.这里的duck是零复数，即复数形式和单数形式完全一样。英语里，有些表示动物名称的名词，如duck（鸭），fish(鱼)，herring（鲱鱼），cod（鳕鱼），shrimp（小虾）,swine（猪）等存在两种复数形式，它们通常以零复数形式出现（只是偏向于使用零复数形式），当然也可以换成规则复数形式。只有在表示或强调不同的种类或个体时则必须采用规则复数形式：
Can you see the ducks on the pond?你看见池塘里的鸭子吗？
Chickens and ducks scratch around the outbuildings.
鸡鸭在棚子周围到处乱刨。
I brought in one drake and three ducks.
我弄来一只公鸭和三只母鸭。
Ducks were swimming around on the river.
鸭子在河面上游来游去。
Ducks' eggs are particularly prized for cake making.
鸭蛋在做糕饼时，格外重要。
wild ducks
野鸭
They fattened up ducks and geese
他们喂肥了鹅鸭。
The famous Beijing ducks are produced here.
著名的北京鸭就是这儿产的。
The ducks dived and surfaced again several metres away.
鸭子潜入水中，然后在几米开外钻出水面。
In the evenings, ducks waddle up to the front door to be fed.
傍晚时分，鸭子们摇摇摆摆地来到前门进食。
There were ducks quacking on the lawn.
草地上有几只鸭子在嘎嘎叫。
2.这里that引导的非限制性定语从句修饰 muscles；但是用that引导的非限制性定语从句是副词罕见的。大家遇到知道怎么回事就行了，平时还是使用which较为妥当。如：
She is devilish like Miss Cutter, that I used to meet at Dumdum.
她像坎特小姐一样恶毒，我在达姆城曾经领教过坎特小姐。
Age, that lessens the enjoyment of life, increases our desire of living.
年龄，消磨着人生的欢乐，也增加了人们求生的欲望。
The patas monkey, that spends almost all of its time in open grassland, adopts just such tactics.
几乎所有时间都呆在开阔草原上的帕塔斯猴，就是采用这样的策略。
His heart, that had lifted at the sight of Joanma, had become suddenly heavy at the sight of Ramdez thumping after her.
瞥见拉姆特兹在琼玛身后，他那一看见琼玛就怦怦跳的心突然地沉重起来。
February, that in other years held intimations of spring, this year prolonged the bitter weather.
2月，在其他年份里，它预示着春天的到来，而今年则延长了恶劣的天气。
She had long been accustomed to the solitary nature of her son’s instincts, that I had tried and failed to stifle.
她早就习惯了我曾经努力但是没有成功消除的她儿子那天生的喜欢独处的性格。
3.be endowed with 提升具有，与生俱来；被赋予
The girl is endowed with brightness.
这个女孩天资颖慧。
She is endowed with literary talent.
她有文学天赋。
She was endowed with intelligence and wit.
她天资聪颖。
You are endowed with wealth, good health and a lively intellect.
你生来就拥有财富、健康和活跃的思维。
He is endowed with indomitable will.
他有不屈不挠的意志。
Hong Kong has been endowed with one of the finest natural harbours in the world.
香港是世界上最好的天然海港之一。
All living beings are endowed with an instinct for survival.
生物都有求生存的本能。
Chinese tourists are endowed with visa-free travel to this country.
该国对中国游客实行免签。
