网络释义专业释义
公布 中文名称：叶背 英文名称：back of blade 定义：船前进时，螺旋桨叶朝向船前方的一面。亦即产生吸力的一面。 应用学科： 船舶工程（一级学科）；船舶性能及其试验（二级学科） 点击加载更多 正在加
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双语例句原声例句
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方法扫描电镜下比较观察川渝商品金银花原植物叶背特征。
MethodsThe scanning election microscope (SEM) was used to compare the characters of the original plant leaf lower epidermis of the commercial Flos Lonicera.
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叶背有无叶毛和叶毛类型的不同对丛枝病的抗性有很大差异。
Resistance to witches' -broom disease was different among different type of leaves.
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假设桨叶以高速旋转进入、离开水面，叶背充满空泡，随边后空泡腔延伸到水面。
It is assumed that the blade of the partially submerged ventilated propeler enters and exits from water at high speed.
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You don't have to do this for Wednesday but let's say for next Monday, and that is: I'd like you to memorize a short poem by Yeats or by Frost, either one.
你们不用今天做,下星期一吧：,我想让你们背一首短诗,叶芝或者弗罗斯特的都行。
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