定义：实验模型在实验风道截面上的投影面积与风道截面积之比称为阻塞比。
当这个发生时，气管壁加厚，产生比平时更多的粘液，将之阻塞。
When that happens, the walls of the airways thicken and produce more mucus than usual, which clogs them up.
如果一个timer在将要执行的时候被阻塞，它将会等待下一个时机(比预期的延时要长)。
If a timer is blocked from immediately executing it will be delayed until the next possible point of execution (which will be longer than the desired delay).
大多数家庭饭食由妇女制备，因此，就接触室内烟雾所导致的慢性阻塞性肺病负担而言，妇女比男性高50%以上。
Women prepare most of the family food, hence, the burden of COPD caused by exposure to indoor smoke is over 50% higher among women than among men.
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