complications
[ˌkɑmplɪ'keʃəns]
n.
（新出现的）困难，难题( complication的名词复数 );
并发症;
曲折;
例句:
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Most children recover quickly and complications are very rare.
来自BBC
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Serious complications have delayed his release from hospital.
各种严重的并发症延迟了他的出院。
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He died of complications from a heart attack.
他死于心脏病发作引起的并发症。
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Complications set in, and the patient died.
病人因出现并发症而死亡.
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If complications occur, another treatment might be needed.
来自BBC
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MMR vaccination offers the only protection against these complications.
来自BBC