作为海洋中最大的生物，蓝鲸很难追踪，但由于商业捕鲸，它们几乎灭绝，现在已被列为濒危物种。
It is hard to track the blue whale, the ocean's largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species.
会议呼吁两年内暂停商业捕鲸活动。
The convention called for a two-year moratorium on commercial whaling.
商业捕鲸在22年前已在全球禁止。
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