英语翻译：The same cause always produces the same effect

题目

英语翻译：The same cause always produces the same effect
The same cause always produces the same effect, and the same effect never arises but from the same cause.
The same cause always produces the same effect, and the same effect never arises from the same cause.
这两句意思一样吗?but是否影响?应该如何翻译?

答案

意思完全相反：
The same cause always produces the same effect,and the same effect never arises but from the same cause.
同样的原因,总会产生同样的效果,而同样的效果,只会出自同样的原因.never...but...只能,只会...
The same cause always produces the same effect,and the same effect never arises from the same cause.
同样的原因,总会产生同样的效果,而同样的效果,决不会出自同样的原因.