So that means as their mate is sitting on the nest incubating the eggs, the other one is out there foraging, and the longer they have to stay gone, the worse condition the mate is in when the mate comes back.
这就意味着，在它们的伴侣 坐在巢穴中，孵化小企鹅的时候， 另一半在外出觅食。 它们需要离开的时间越长， 当它们回去的时候，它们所面临的情况就越严重。