outsidee外部的outsideadv.在外面n.外面adj.外部的prep.在 ... 外边outside string外侧楼梯帮outside-wall外墙outside strake搭接外列板outside symbol外化符号outside colter外开沟器outside sleeve外套outside flange外法兰outside center外侧正锋outside window外部窗outside chance极少的可能性,不大可能的机会

1. There is no evidence, howeven, that outdoor air pollution is an initiating cause of asthma.
   然而，没有明显证据表明室外空气污染是哮喘病的最初起因。
2. The external air temperature can be measured by a simple external air sensor and a PC can continuously register and average them.
   室外气温可以用一个简易的室外空气传感器测量，计算机可以连续记录并进行平均值计算。