1, with different pronunciations: the pronunciation from the top is ti à ow à ng; Lookout is pronounced Li à ow à ng; Roy's pronunciation is yáowàng.
2. Different meanings: looking down means standing on a high place and looking into the distance; Lookout refers to observing from a height or a distance; Seeing from a distance is seeing from a distance.
3, the usage is different: overlooking the heel object, such as overlooking the distance; Look at the back of the sentence, like a coastal defense soldier looking at the vast sea warily; Look at the back is also an object, such as looking at the starry sky.