正文：问：鼻癌化疗后如何防再次发作？
Ask: After nose cancer changes cure how to prevent recrudesce?
鼻癌是怎样产生的？
甲醛一直被怀疑是导致鼻癌及肺癌的致癌物质。
Formaldehyde is a suspected carcinogen linked to nasal and lung cancer.
鼻癌影响鼻旁窦（鼻旁骨质内的小腔腺）和鼻内的呼吸通道。
Cancer of the nasal passages affects the paranasal sinuses (the small cavities in the bone surrounding the nose) and the breathing passages in the nose.
木头作为原材料得到广泛应用，但硬木粉尘（如橡木和山毛榉粉尘）可导致人患鼻癌。
Wood is used widely as raw material, but hard wood dust (e. g. oak and beech) can lead to nose cancer.
被动吸烟与淋巴癌、鼻癌、肺癌、各种过敏、眼病、皮肤疾病以及宠物的呼吸道疾病有关。
Passive smoking has been associated with lymph gland, nasal, and lung cancers, allergies, eye and skin diseases, as well as respiratory problems in cats and dogs.
二手烟与猫和狗的淋巴结癌、鼻癌和肺癌的发生有关，同时也会参与它们一系列的过敏性疾病、眼睛及皮肤疾病及呼吸道疾病的发生。
Second hand smoke has been linked with lymph gland, nasal, and lung cancers, plus a range of allergies, diseases of eye and skin, and respiratory problems in cats and dogs.
二手烟与猫和狗的淋巴结癌、鼻癌和肺癌的发生有关，同时也会参与它们一系列的过敏性疾病、眼睛及皮肤疾病及呼吸道疾病的发生。
Second hand smoke has been linked with lymph gland, nasal, and lung cancers, plus a range of allergies, diseases of eye and skin, and respiratory problems in cats and dogs.
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