Although they are a natural phenomenon, dust storms have been occurring more often, at shorter intervals, and with greater force in recent years, and human activity is the cause.

沙尘暴虽是自然现象，但是近年来发生的频率却逐渐增加，间隔的时间也愈来愈短，破坏力更强大了，人的活动是罪魁祸首。

youdao

This forgetting is evidently a complex phenomenon; for Strumpell attributes it not to a single cause, but to quite a number of causes.

梦的遗忘很明显是一个复杂现象，斯顿培尔认为其诱因并非单一，而是多重的。

youdao

Neural e vidence shows that the phenomenon of'falling in love' is a series of chemical reactions taking place in the brain that cause mental and physical reactions.

神经迹象显示，“恋爱现象”是大脑里发生的一系列化学反应，引起了精神和体质的反应。

youdao

Warmer temperatures cause water to expand,a phenomenon called thermal expansion, and cause glaciers and polar ice caps to melt.

VOA: standard.2009.11.09

The media are both a product and cause of this political phenomenon.

CNN: Commentary: News can outlast newspapers

It is widely agreed that the root and cause of honour killing is a complex, historical phenomenon which has no justification in Islam's holy book, the Koran, and which has also been known to occur elsewhere in the world and among other religions.

BBC: Jordan's dilemma over 'honour killings'