The study in question was of Nile lechwe, an endangered antelope.

研究的对象是尼罗河驴羚，一个濒危的羚羊品种。

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Lechwe rest as the setting sun casts a purple glow over Botswana's Okavango Delta.

夕阳西下，博茨瓦纳的奥卡万戈三角洲被一片紫色的光辉所照耀，驴羚正在休息。

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The reason this is interesting is that a lechwe mother is three times as likely to die while giving birth to a son (or during the subsequent week) as when she bears a dauhter.

之所以说这个现象有趣，是因为母羚羊因产雄性子羚羊而在分娩时（或随后一周内）引起的死亡率是生产雌性子羚羊的3倍。

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Midbite into an ostrich burger at lunch one day, I watched the vanguard of an elephant herd emerge onto the lagoon shore, about 100 yards away, and each evening I trained my binoculars on the red lechwe gathered in the shallows, their russet coats burnished by the sun's slanting rays.

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