常见句型：
1、We may live to see the extinction of the whale.
人类或许能亲眼见到鲸的灭绝。
2、The whale thrashed the water with its tail.
那条鲸鱼不住地用尾巴击水。
3、The blue whale is the world's largest living animal.
蓝鲸是当今最大的动物。
