bad weather前到底何时用定冠词，何时不用定冠词？有时见到 bad weather，有时又见到 the bad weather。如：
Owing to the bad weather the match was cancelled. 由于天气不好，比赛取消了。
A spokesman said that bad weather was to blame for the delay. 发言人称，延误是由糟糕的天气造成的。