是的，但是侵蚀是由多种原因引起的，比如天气和侵蚀山脉的河流。
Yes, but erosion is caused by many factors, like weather and rivers carving into the mountains.
本病病因比较复杂，最初认为猝死症是一种综合症，可能由多种原因引起。
This disease was considered as a syndrome caused by poly-agents at the beginning.
听力受损是由多种原因引起的，包括传染性疾病、噪声、外伤或者仅仅是由于老化。
Hearing loss can be caused by a variety of factors, including infectious disease, loud noises, injury and simple aging.
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