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After 1985, it is the phase to form the branch subject of fire ecology.
1985年以后，火生态学分支学科形成阶段。
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The science of fire safety is a newly developing branch of course.
火灾安全学是一门正在兴起的科学。
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The science of fire safety is a newly developing branch of course.
火灾安全学是一门正在兴起的科学。
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