而使这种直立行走能够发生的物质是被称为4号菌毛(IV pili)的附属物，它行使了类似腿的功能。
What enables this upright walking are appendages called type IV pili, which function as the analog of legs.
直立穗型品种抽穗后干物重和成熟期干物重明显高于另二种穗型，抽穗后干物重占成熟期干物重和产量的百分比也较高；
The dry matter accumulated after heading and the biomass of mature stage of varieties with erect panicles were higher than that of varieties with semi-cured and cured.
一排书的末端应放个支撑物以使书本保持直立。
A rest shall be placed at the end of a row of books to keep them upright.
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