This unusual explosive and intense star formation activity qualifies as a starburst.

这种不寻常的爆发和剧烈的恒星形成活动有星暴的资格。

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The methane producing formation activity and settling characteristics of the sludge were closely related to microbial composition and structure.

污泥的产甲烷活性和沉降性能等与其微生物组成结构密切相关。

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This is not surprising, given that precipitation is one of the two external triggering mechanisms—the other being seismic activity—involved in the formation of landslides.

考虑到降水是涉及滑坡形成的两个外部触发机制之一——另一个是地震活动，这并不奇怪。

youdao

Entrepreneurial activity and new business formation in the United States dropped sharply during the economic downturn and has not fully rebounded.

FORBES: Fueling Economic Expansion through Investment in Entrepreneurs

The youthful activity, though, profoundly affects the formation of stars in the galaxy itself and beyond.

WSJ: Book Review: Gravity's Engines

By contrast, modest black-hole activity can stir things up and encourage the formation of the kinds of elements (carbon, oxygen and so on) that are essential for life as we know it.

WSJ: Book Review: Gravity's Engines