“在户外”的英语可以翻译为：alfresco，in the open air，without doors，out of doors ...

除了最严寒的冬季，这种植物都能在户外生长。The plant will stand all but the worst winters out of doors.在户外，蚊子和蠓虫永远让人不得安生。Outdoors, mosquitoes and midges were a perpetual torment.我们有时候在户外吃饭。Sometimes we eat out of doors....