Duck, and like them the pigeons, are endowed with steel-like muscles, that are a good part of the weight of the bird,
野鴨及它們相似的鴿子，都長着鋼鐵般的肌肉，占了該種鳥體重的很大一部分。
1.這裡的duck是零複數，即複數形式和單數形式完全一樣。英語裡，有些表示動物名稱的名詞，如duck（鴨），fish(魚)，herring（鲱魚），cod（鳕魚），shrimp（小蝦）,swine（豬）等存在兩種複數形式，它們通常以零複數形式出現（隻是偏向于使用零複數形式），當然也可以換成規則複數形式。隻有在表示或強調不同的種類或個體時則必須采用規則複數形式：
Can you see the ducks on the pond?你看見池塘裡的鴨子嗎？
Chickens and ducks scratch around the outbuildings.
雞鴨在棚子周圍到處亂刨。
I brought in one drake and three ducks.
我弄來一隻公鴨和三隻母鴨。
Ducks were swimming around on the river.
鴨子在河面上遊來遊去。
Ducks' eggs are particularly prized for cake making.
鴨蛋在做糕餅時，格外重要。
wild ducks
野鴨
They fattened up ducks and geese
他們喂肥了鵝鴨。
The famous Beijing ducks are produced here.
著名的北京鴨就是這兒産的。
The ducks dived and surfaced again several metres away.
鴨子潛入水中，然後在幾米開外鑽出水面。
In the evenings, ducks waddle up to the front door to be fed.
傍晚時分，鴨子們搖搖擺擺地來到前門進食。
There were ducks quacking on the lawn.
草地上有幾隻鴨子在嘎嘎叫。
2.這裡that引導的非限制性定語從句修飾 muscles；但是用that引導的非限制性定語從句是副詞罕見的。大家遇到知道怎麼回事就行了，平時還是使用which較為妥當。如：
She is devilish like Miss Cutter, that I used to meet at Dumdum.
她像坎特小姐一樣惡毒，我在達姆城曾經領教過坎特小姐。
Age, that lessens the enjoyment of life, increases our desire of living.
年齡，消磨着人生的歡樂，也增加了人們求生的欲望。
The patas monkey, that spends almost all of its time in open grassland, adopts just such tactics.
幾乎所有時間都呆在開闊草原上的帕塔斯猴，就是采用這樣的政策。
His heart, that had lifted at the sight of Joanma, had become suddenly heavy at the sight of Ramdez thumping after her.
瞥見拉姆特茲在瓊瑪身後，他那一看見瓊瑪就怦怦跳的心突然地沉重起來。
February, that in other years held intimations of spring, this year prolonged the bitter weather.
2月，在其他年份裡，它預示着春天的到來，而今年則延長了惡劣的天氣。
She had long been accustomed to the solitary nature of her son’s instincts, that I had tried and failed to stifle.
她早就習慣了我曾經努力但是沒有成功消除的她兒子那天生的喜歡獨處的性格。
3.be endowed with 提升具有，與生俱來；被賦予
The girl is endowed with brightness.
這個女孩天資穎慧。
She is endowed with literary talent.
她有文學天賦。
She was endowed with intelligence and wit.
她天資聰穎。
You are endowed with wealth, good health and a lively intellect.
你生來就擁有财富、健康和活躍的思維。
He is endowed with indomitable will.
他有不屈不撓的意志。
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.
該國對中國遊客實行免簽。