Researchers say there is compelling evidence that he was ‘Kell positive’, a rare blood type which can cause serious health and fertility problems.
研究人员称具有强有力的语气证明他是“凯尔阳性”，这是一种罕见的血型，会导致严重的健康问题和生殖障碍。
Very expensive and would require some serious rocket building to enable so many launches, which could cause problems for the ozone layer.
这个方案十分昂贵，而且为了将这么多遮阳板发射到太空中，可能需要建造许多火箭，而这可能会破坏臭氧层。
It'll be the first American city to ban the product which can clog arteries and cause serious health problems.
这将是第一个规定禁止使用能造成动脉堵塞和严重健康问题的产品的美国城市。
WHO recommends an upper limit of 20 micrograms for PM10s, which can cause serious respiratory problems in humans.
世界卫生组织建议可吸入颗粒物的上限为20微克，这种体积的颗粒物将导致严重的人体呼吸系统疾病。
Silicone leakage has been reported in some cases which may cause serious health problems.
有机硅泄漏已报道，在某些情况下可能会导致严重的健康问题。
WHO recommends an upper limit of 20 micrograms for PM10 s, which can cause serious respiratory problems in humans.
世界卫生组织建议可吸入颗粒物的上限为20微克，这种体积的颗粒物将导致严重的人体呼吸系统疾病。
As a result, they tend to defend high up the pitch - which is a risky tactic - but they can certainly cause the opposition serious problems at the other end.
因此，他们倾向于高球的防守，这无疑是一条危险的战略。但他们总能给对手带来棘手的麻烦。
As a result, they tend to defend high up the pitch - which is a risky tactic - but they can certainly cause the opposition serious problems at the other end.
因此，他们倾向于高球的防守，这无疑是一条危险的战略。但他们总能给对手带来棘手的麻烦。
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