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He spray, which is harmless to the environment, can be used to protect against disease, guard vineyards against fungal threats and coat the nose cones of high-speed trains, it has been claimed.
据称，一种对环境无害的喷雾能用来预防疾病、防范真菌对葡萄园的威胁，覆盖高速列车的鼻锥。
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