电梯变频驱动 VVVF drive ; Lift variable frequency drive

阶梯变量 [统计] ladder variable

阶梯变焦 Step Zoom

阶梯变化中性滤光片 SND

使电梯变得更好 make lift get better

梯形畸变 keystone-type distortion ; [电子] keystone distortion ; trapezium distortion ; [电子] keystone

变性梯度凝胶电泳 DGGE ; denaturing gradient gel electrophoresis ; denaturing gel gradient electrophoresis ; Degenerative gradient gel electrophoresis

阶梯型变型 keystone

梯度变化 change of gradient ; gradient change ; gradience