通过干旱与乙烯介导下的番茄幼苗三重反应、植株的生理变化、幼苗生长表现及NR基因表达的研究，探讨干旱对乙烯信号转导的影响。
The relations of NR gene, ethylene and drought were studied by the changes of growth, physiology and expression of NR gene in tomato seedlings under stress of drought and ethylene.
三重阶音频信号是有三次简短高音爆发的蜂音信号之一。
Triple order tone is one of the order tones that has three short spurts of high tone.
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