前面加冠詞the，例如：
1、Their mood is generally glum-and not just because of the pollution that has blighted China's capital over recent months， after what had been a glorious spring.他們大都心情鬱悶，不僅僅是因為近幾個月一直困擾中國首都的汙染問題——在過了一個明媚的春天之後。
2、Yet the pollution problem suggests the leadership needs urgently to adopt a "greener" measure of "performance."然而汙染問題表明，領導層需要迫切採取“更綠色”的“績效”措施。
