1987年和1988年以染色体倍数不同的- 15个小麦种为材料，研究不同染色体组成对诱导愈伤组织和分化绿苗的效应。
This study dealt with the effects of chromosome complement on callus induction and differentiation in 15 Triticum species of different Ploidy in 1987-1988.
在完成对开口主梁细致完整的计算分析之后，总结主梁开口效应得出相关结论。
After finishing the detailed analysis and integral calculation of the aperture girder, then summarize relevant conclusion from main girder's aperture effect.
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