It could signal high status, which would be adaptive in terms of mating.
男性的这些表情特征可能表明他们拥有较高的地位，这在繁衍后代方面是很有利的。
Did I mention it's mating season?
我有提到过配对季节到了吗？
Did I mention it's mating season?
我有提到过现在是繁殖季节么？
让我们来玩一个配对游戏吧！
He had, from his second mating, a baby girl.
他第二次结婚后得一女孩。
Port area shall be 100% of the mating pipe port area through the entire valve length.
整个阀门的流道截面应该与管道的流道截面100%相同。
Mating flange ID must match sleeve ID.
配套法兰内径必须与套管内径匹配。
Mating flange ID must match sleeve ID.
配套法兰内径必须与套管内径匹配。
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