The mother humpback whale and her calf have made progress toward the Pacific Ocean in the past few hours but biologists say the pace has slackened.
The mother humpback whale and her calf have made progress toward the Pacific Ocean in the past few hours but biologists say the pace has slackened.
鲸鱼母子一直向着太平洋游去，但是生物学家说他们已经放慢脚步。