guò / qù / yī / liáo / tiáo / jiàn / yǒu / xiàn / lì / zhèng / yǒu / shí / huì / yǐn / fā / yán / zhòng / de / bìng / fā / zhèng

过去医疗条件有限，痢症有时会引发严重的并发症。

In the past, limited medical care meant that dysentery could sometimes cause serious complications.