For the first time, scientists have researched the heartbeat of a bluewhale.
科学家们首次研究了一条蓝鲸的心跳。
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In the ocean where food is easier to find, a bluewhale, for instance, can eat up to 8,000 pounds of food a day.
例如，在更容易找到食物的海洋中，一只蓝鲸一天可以吃多达8000磅的食物。
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Biologists were delighted early this year when, with the help of the Navy, they were able to track a particular bluewhale for 43 days, monitoring its sounds.