The illness is organic in origin.
该病起初是器质性疾患.
The theory that all geologic phenomena may be explained as the result of existing forces having operated uniformly from the origin of the earth to the present time.
（地）均变说一种理论，可以将所有地质现象解释为从地球起源到现在已均匀作用的现存力的结果
The social unrest has its origins in economic problems.
社会动荡是经济问题引起的。
