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汉语拼音：yè piàn

1.叶的组成部分之一，通常是很薄的扁平体，有叶肉和叶脉，是植物进行光合作用和蒸腾作用的主要部分。

2.涡轮机、水泵、鼓风机等机器中形状像叶子的零件，许多叶片构成叶轮。

• Overhead, the chopper roared and the big blades churned the air.

  头顶上，直升机在呼啸，巨大的螺旋桨叶片搅动着空气。

• rotor blades on a helicopter

  直升机的旋翼叶片

• The propeller blade has been mounted.

  推进器的叶片已经安装好了.

• The paper on the walls was pale gold, embossed with swirling leaf designs.

  墙纸是淡黄色的，上面饰以漩涡状叶片凸起图案。

• A plant's lungs are the microscopic pores in its leaves.

  植物的肺就是其叶片上微细的气孔。

• Rates of leaf photosynthesis have little relationship to yield.

  叶片的光合作用速率与产量的关系不大.

• The blade is clamped and excited into some mode of vibration.

  叶片夹好后,被激发进入某种振动状态.

• Plants from equatorial regions have large, thin sparsely hairy leaves.

  在赤道地区其植物叶片大而薄,并被以稀毛.

• Straightening vanes can be used where long straight ways are not possible.

  在不可能安装较长的直管段情况下,可以来用导流叶片.

• Do the vanes in the figure rotate clockwise or counterclockwise?

  图中叶片的旋转方向是顺时针的,还是反时针的?

• Explain why the vanes rotate when they are illuminated.

  试解释:叶片被照亮时为什么会旋转.

• When these breezes reached the platform the palm - fronds would whisper.

  微风吹到平台时,棕榈叶片发出簌簌的低吟.

• Already the Snowblast's huge auger blades were engorging snow.

  扬雪车上庞大的钻头叶片在开始大量吞进积雪.

• Flowers on variegated branches yield offspring that have variegated foliage.

  有斑驳的枝条上的花,产生有变异叶片的后代.

• Straightening vanes are effective in reducing the upstream pipe - length requirement.

  矫直的叶片对于减少上游直管的要求长度是有效的.