Walking upright permitted the father to use his hands to gather food and carry it to his mate from a distance.
直立行走使父亲可以用手收集食物并从远处把食物带给他的配偶。
Has tha' noticed how th' robin an' his mate has been workin' while we've been sittin' here?
我们坐在这儿的时候，你注意到知更鸟和它的太太一直在忙碌吗？
Another cuts them into planks, which his mate tosses onto a rising stack.
另一名伐木工将它们切成板材，他的同事再将这些板材扔到一堆不断变高的板材上。
Or flitting among the trees of the apple-orchard, building the nest of his mate.
或在苹果园的树木中飞动，给它的爱侣筑巢。
The carpenter working on the rafter passed his axe down to his mate below.
在椽子上干活的木匠将斧子传给下面的伙伴。
On our first day out for a safari in Kenya, we came upon a sleeping lion and his mate.
我们第一天在肯尼亚狩猎远征，就遇到了一对狮子。
Before Crowfeather could reply, his mate, Nightcloud, stalked from the shadows beyond the border.
鸦羽回话之前，他的伴侣夜云从阴影中走出，越过了两族族边界。
The male peregrine's love of his cliff is the strongest bond in his life, even greater than the attachment to his mate.
这只雄隼对着这片崖壁的热爱已成为它生命中最牢不可破的约定，甚至比它对伴侣的爱恋还要强。
Whispered songs are usually meant for females during courtship, the researchers say, so when another male hears it, he thinks someone is trying to steal his mate right from under his beak.
研究人员称，轻柔的鸣叫通常意味着求偶期对雌性的呼唤，因而当另外一只雄性听见之后，它会以为有别的雄性企图把它的配偶从眼皮底下偷走。
Whispered songs are usually meant for females during courtship, the researchers say, so when another male hears it, he thinks someone is trying to steal his mate right from under his beak.
研究人员称，轻柔的鸣叫通常意味着求偶期对雌性的呼唤，因而当另外一只雄性听见之后，它会以为有别的雄性企图把它的配偶从眼皮底下偷走。
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