outdoor air的用法和樣例：
例句
- There is no evidence, howeven, that outdoor air pollution is an initiating cause of asthma.
然而，沒有明顯證據表明室外空氣污染是哮喘病的最初起因。 - The external air temperature can be measured by a simple external air sensor and a PC can continuously register and average them.
室外氣溫可以用一個簡易的室外空氣感測器測量，計算機可以連續記錄並進行平均值計算。
