所有患者均有不同程度的肺功能减退，最大肺活量平均为正常值的52%。

All patients had a decrease of pulmonary function with an average of 52% of normal vital capacity.

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最大肺活量是指在深吸气之后呼出的最大气量，它与肺功能没有太大关系。

The total amount of air they could blow out after a deep breath was also measured (Forced Vital Capacity, FVC), but there was little effect on this measure.

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肺活量是一次呼吸的最大通气量，在一定意义上可反映呼吸机能的潜在能力。

The vital capacity is a breath biggest ventilation quantity, in a sense may reflect the breath function potential power.

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