红烟，明代后期配制的一种红色信号发烟剂。其配制的成分有：硝火1两、松香2两、黄丹1两、沥青8分。
一个接着一个，每一次爆炸都在屏幕上冒起一小阵红烟。
One after another, each bomb shows up as a little red puff on the screen.
通过盆栽试验和室内分析，研究低磷胁迫对晒红烟内源激素和根系活力的影响。
By using pot tests, the effect of low-P stress on dark sun-cured tobacco endogenous hormone and root activities were studied during different growth stage.
贾宝玉、薛宝琴、邢岫烟、平儿四人同一天过生日。 众小姐带上自己的丫头们借机在芍药栏中红香圃三间小敞厅内饮酒行令，一时敞厅内热闹非凡。
As jia baoyu, Xue Baoqin, Xing youyanand Ping'er had birthdays on the same day, the young ladies held a hilarious drinking party in the hall of the peony garden for them.
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