1·Severe or repeated bouts can lead to respiratory distress, mental disability, wasting disease and, at the extreme, rupture of the spleen.
严重或者反复的发作可导致呼吸困难，无精打采，体力消耗，严重的时候还会导致脾脏破裂。
2·Italian doctors describe how a 18-year-old man with a history of asthma suddenly experienced bouts of breathlessness during the summer months, when he was normally free from these symptoms.
来自意大利的医生描述了一名18岁的有哮喘病史的年轻人在暑假里完全没有征兆的情况下突然哮喘发作的案例。
3·For instance, both fail to mention how his frequent bouts of depression may have contributed to his impulsiveness and risk-taking.
比如说，两本书都没有提到，他经常发作的抑郁症可能是冲动和冒险行为的罪魁祸首。
4·Successive bouts of heart failure are apt to become more refractory to treatment.
连续发作的心力衰竭可能变得难于治疗。
5·The ongoing criticism, frustration and bouts of illness eventually lead to Macquarie's resignation in 1821.
正在进行的批评，挫折和疾病发作，最终导致麦格理在1821年辞职。