http://photography.about.com/od/camerabasics/ss/ShutterSpeed.htm
Found the link above. It gave me a lot of information on photographing.

For example, shutter speed can also affect the outcome of my photograhps.

Next was the digital zoom vs optical zoom.

Digital zoom is basically a digital crop within the camera. It is not a true magnification. When you use digital zoom you are effectively only capturing part of an image, with lower resolution than the full frame image would have.
Optical zoom is magnification created by a lens. This type of magnification is a "true zoom" and should not adversely affect image quality. Optical zoom should be your first choice for magnification whenever possible.

Though these two functions seem easy but you really need to control them well to capture a beautiful picture. And now I know why my images tend to blur.

The photo below was taken at Orchard Road.

My classmate told me about the lightings there.

And yea, it was GREAT!
BUT!~ the photo was blur as I did not zoom until it is clear and sharp.

So the effect was not very good.