结果表明叶绿体片段和核片段均支持“翅茎草复合群”不是一个单系类群，可以划分为两个不同的分支。
The results showed that "Pterygiella complex" was not a natural group and could be divided into two different clades.
水稻茎秆是典型的生物复合材料，有着优良的力学性能，起到支撑和抗倒伏的作用。
Rice stem is a perfect kind of composite material with excellent mechanical property such as supporting and lodging resistance.
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