A:你数码相机的像素是多少?
How many pixels does your digital camera have?
B:550万像素。
5.5M pixels.
A:What's your camera's pixel?
B:five point five million.
口语不一定要全部翻译出来,简单能够理解就好
A: How many piexl are your digital camera?
B: 5.5 million.
A:How much pixei is your digital camera ?
B:5.5 million
A:Your digital camera is the number of pixels?
B:550million pixels.