以二年生草本花卉黑心菊为材料，研究了温室环境对其生长的影响。
The influence of greenhouse environment on the growth of in rudbeckia hirta a biennial herbaceous flower was studied.
二年生植物：在两个生长季内完成全部生活史的植物。
Biennial a plant that completes its life cycle within two years.
这是与一年生和二年生对比而言的。
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