The birds must be weighed, sexed and tagged.

必須對這些鳥稱重，辨識雌雄并掛上標(biāo)牌。

柯林斯例句

Miss Moneypenny: You know, this category of activity could remember as sexed harassment.

彭妮: 你知道, 這種行為可以界定為性騷擾.

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Frontosa can only be sexed reliably by venting, and even this method cannot always be trusted.

比較可信的方法是通過泄殖孔判斷, 甚至于這個(gè)方法也不是總是有效的,通過泄殖孔判斷性別需要一定的經(jīng)驗(yàn).

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