the activity of mankind

基本解释

The irrational economic activity of mankind is the turning point from physical erosion to manmade accelerated erosion.
人为不合理的经济活动，是由自然侵蚀发展为人为加速侵蚀的重要转折点。
Nature of being participated: While the greening coverage of eco houses does not cast away the activity of mankind, the subject of houses (i. e. human) can be in harmony with greening groups.
可参与性——生态住宅的绿化覆盖不应排斥人群的活动，住宅主体（人）可以融入组团之中。
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The editor activity is one of mankind's important cultural activities.
编辑活动是人类重要的文化活动之一。

Without the prospect of earning a profit, all activity above bare subsistence would cease (or would never have occurred) and mankind might still be in the caves.
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