牙医可能会决定拔掉那颗牙，以免反复发作。A dentist may decide to extract the tooth to prevent recurrent trouble.他死于劳累过度引起的心脏病发作。He died of a heart attack brought on by overwork.新药减轻了肺炎发作时的痛苦。The new drug lessens the severity of pneumonia epi...
The spatial distribution patterns of larvae and pupae are congregating distribution.幼虫和蛹的空间分布均为聚集分布.He says victims of violence are congregating there because they feel safer.他说暴力的受害者聚集在这里因为他们觉得更安全.For the binary matrix,...