There are four basic alternatives; they are described briefly below.

有4个基本的选项，简述如下。

I have given the matter much thought, examining all the possible alternatives.

这个问题我已经考虑了很多，分析了各种可能的选择。

These alternatives were clear to the philosophers of ancient Greece.

对古希腊的哲学家来说,两者必居其一是明显的.

Facing the practical situation, I considered various alternatives.

面临眼前的情景, 我考虑过各种不同的办法.

Someone must decide a course of action from among alternatives.

人们必须在各种可行方案中决定一项行动方案.

Lessons of experience show that these are not the real alternatives.

经验教训表明,这些并不是真正的出路.

Not to be a fool might not be worth the difficult alternatives.

是不是做傻瓜,看来也不值得煞费苦心去作出选择.

The appearance of alternatives, the possibility of an option, is an illusion.

可选方案的出现, 作出选择的可能性是一种幻觉.

Between human beings there are only two alternatives, either brotherhood or crime.

人与人之间的关系只有两种选择, 不是和睦相处便是尔虞我诈.

In particular, what alternatives and environmental impacts must be discussed?

特别是, 必须讨论哪些替代方案以及哪些环境影响.