Question

8. There is no alternative        and choose the approach for which the lowest noise may be calculated.(analyze)

应当分析各种可能，选择一种令噪音最小的方案，除此之外别无他法。

Answer 1

8. but to analyze the various possibilities考查there is no alternative but to do sth.结构„there is no alternative buttodosth.意为"除了做某事别无选择"。人作主语时用have no alternative but to do sth. 类似的结构还有have no choice but to do sth.，have nothing to do but do等。but作介词，意为"除了"，当but 前面有动词do的任何形式，but后面的不定式要省略to;当其前没有do的某种形式时，but后面的不定式要带to。