户外的英文是outdoors。解释：outdoors 英[ˌaʊtˈdɔ:z] 美[ˌaʊtˈdɔ:rz] adv. 在户外; 向户外; n. 户外; 野外; 露天; 世间; [例句]It was warm enough to be outdoors all afternoon天气很暖和，整个下午都可以呆在户外。I'm a lover of the outdoors 我喜爱户外运动。The ceremony was being held outdoors. 该仪式正在户外举行。In hot countries it's possible to sleep outdoors. 在炎热的国家里可以睡在露天。He is a keen outdoors man with a great interest in photography and walking. 他非常喜欢户外运动，酷爱摄影和徒步旅行。Outdoors, mosquitoes and midges were a perpetual torment. 在户外，蚊子和蠓虫永远让人不得安生。
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