main complication
主要的并发症
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The main complication was fixation failure.
主要的并发症是内固定失败。
youdao
The main complication and the major causes of death were infection.
感染是主要的合并症和死亡原因。
The main complication after operation is shallow chamber in early period.
术后早期主要并发症为浅前房；
The main complication with AS levels is that they only become a qualification (and publishable as such) if and when a candidate accepts an AS Certificate, ie.
BBC: Heads' letter warns of AS-level confusion
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