“明开夜合木”是一种罕见的珍贵木料，它只生长在承德山区和避暑山庄内。
"Ming opening night Aiki" is a rare, precious wood, which only grows in the mountains and Summer Resort in Chengde.
本文介绍了塑合木的新工艺，配方、产品性能和应用前景。利用本文研究的加热-催化法制备塑合木，其成本可大幅度降低。
The new process, preparation, performance and application prospect of the plastic wood are introduced. The heating - catalyzing method of preparing plastic wood can reduce cost greatly.
消极围栏保护可缓解人为因素对四合木种群的影响，但无法有效促进四合木种群的更新；
Mongolica under the situation of natural renewal, negative conservation by corral, and positive conservation by corral are studied.
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