将“human activity"翻译成中文

However, not all air pollution originates from human activity.

然而,并非所有的空气污染都源自人类活动。

As migratory species, cetaceans are particularly vulnerable to the cumulative impacts of a number of human activities.

鲸目动物作为洄游物种,特别容易受到一些人类活动的累积影响。

but it has the power to suggest and even direct human activity.

但是它有指示,甚至引导人类行为的力量。