• 离题,不着边际

besideprep.在 ... 旁边；与 ... 相比；和... 无关beside the Huangshui River他的罪责无法减轻。;他的罪责无法用任何辩解减轻。Beside it is a bookshelf.床旁边是个书架。Beside thee's ceased to shine没有什么能减轻打击。Beside yon distant milky way.在遥远的银河彼岸。Beside stands supervise management监理

1. I'm afraid what you're saying now is off the point.
   恐怕你现在所说的有些离题。
2. The discussion is beside the question.
   讨论离题了。
3. Please stick to the point,what you're saying is irrelevant.
   请不要离题，你说的尽是不相干的话。
4. Keep in mind that each source point on the extended source is incoherent with respect to the others.
   要记住，扩展光源上各个点之间彼此都是不相干的。