The size of the crowd and mobile, to popularize knowledge about disease prevention very difficult.
人群规模大、流动性强，给防病知识普及带来非常大的难度。
Popularize the scientific knowledge of food, improve the ability of security.
普及食品科学知识，提高安全防范能力。
The fourth, Popularize the factoring knowledge.
第四，普及保理常识。
The fourth, Popularize the factoring knowledge.
第四，普及保理常识。
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