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Mosquitoes and flies are harmful insects. They spread diseases and threaten out health.
孩子和苍蝇是害虫。它们散播病菌，威胁我们的健康。
youdao
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Some diseases are spread by flies.
有些疾病由苍蝇传播。
youdao
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Flies and mosquitoes can cause the spread of diseases.
苍蝇和蚊子都会传播疾病。
youdao
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Flies can spread diseases.
苍蝇可以也许传布疾病。
youdao
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Flies can spread diseases.
苍蝇可以也许传布疾病。
youdao