Distance 和 Displacement 的区别

long distance和long-distance的区别? in the distance 和 over a long distance的区别 in the distance 和at a distance 的区别 in the distance和at a distance 的区别 into the distance和in the distance的区别 in the distance 和at a distance的区别 trip ,distance,journey和traval 的区别 distance 和 length区别 in the distance和 at distance区别 ten-mile distance和 ten miles` distance区别 from a distance和in a distance有什么区别 at distance和in the distance有什么区别吗?