1、在户外用英语是outdoors，读音：英[?a?t?d??z]美[?a?t?d??rz]
2、adv.在户外; 在野外;n.野外; 旷野; 郊外;
3、[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。