erect stem短语¹³¹⁶²⁰⁺³ 基本例句 直立茎 The characteristic of the ecotype was a lower erect stem, no obvious long axis, and a short axis of creeping stems, smaller leaves, middle creeping growth and tillering rate. 该生态型具有植株比较低矮，匍匐茎长短轴的差异不明显，叶片相对较小，匍匐茎生长速度和分蘖能力中等特点。 cnki