在于它们的意思和用法不同。
Look outside(往外看)通常用于描述观察窗外的景象,或者是指某人离开了室内环境并直接注视着户外物体。例如:- Can you look outside and see if it's raining?- She looked outside the window and saw a beautiful sunset.Look out(注意/当心)则是用于提醒某人注意可能存在的危险或问题,避免受到伤害。可用于提醒某人不要接近某个地方,或者警告某人他们可能会被攻击等。例如:- Look out! There's a car coming!- You need to look out for snakes when you're hiking in this area.总的来说,Look outside着重于视觉的观察,而Look out则是针对某种潜在的危险或威胁的提醒。