• An approximate anatomy of the fertile egg is shown in the accompanying notes.

    附带注解显示了受精卵大致构造图。

    youdao

  • He kindly offers them an extra egg laid by a fertile couple, and the male penguins take turns keeping it warm.

    好心地从别的企鹅那里找蛋,雄性企鹅便轮流保暖。

    youdao

  • He kindly offers them an extra egg laid by a fertile couple, and the male penguins take turns keeping it warm.

    好心地从别的企鹅那里找蛋,雄性企鹅便轮流保暖。

    youdao

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