1. But neither psychiatric interviews nor objective tests were able to show any effects upon these American sailors.
    但是无论是精神病学的走访或客观的试验, 都不能显示噪音对这些美国水兵有任何影响.

2. But neither psychiatric interviews nor objective tests were able to show there is any effect upon these American sailors.
    但是，不管进行精神病学的调查访问，还是进行客观的测试，都不能显示噪音对这些美国水兵有任何影响。

3. It must be so small that present methods of psychiatric diagnosis cannot find it.
    这一定很小, 目前精神病的诊断方法还发现不了.

4. It must be so small that present methods of psychiatric diagnosis cannot find it.
    那也一定是微乎其微，以致现代的精神病诊断方法还发现不了。