The common depletion of volatile elements in terrestrial planets was probably caused by the early violent activities of the inner solar nebula.

类地行星挥发性元素普遍亏损很可能是由于太阳星云早期剧烈的太阳活动引起的。

youdao

Authorities blame the clashes on violent elements among the protesters that they say have fired grenades and guns at soldiers who were forced to return fire.

VOA: standard.2010.05.15

Western involvement in this "struggle for the soul of Islam" is a matter of self-preservation for the West and is critical given the violent tactics and strength of radical elements in Muslim societies worldwide.

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It said criminal elements in some government ministries were so violent and dangerous that commission inspectors could not safely do their work.

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These remarks came after elements linked with the Sandinista government tried to undermine protesters and block their demonstrations in a rather violent way.

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