区别就是两者都是名词但意思是不一样的，具体的不同如下
lens中文意思是n. 透镜，镜片；（相机的）镜头；（眼球的）晶状体；隐形眼镜
A lens would magnify the picture so it would be like looking at a large TV screen.透镜会把图像放大，这样就会像看大电视屏幕。
sensor中文意思是n. （探测光、热、压力等的）传感器，敏感元件，探测设备
The electronic sensor has been adapted to fit on a newborn baby.电子传感器已被改装以适应新生儿。
