paint是画的意思，而picture则是图片的意思，区别可以从以下例子看出：
This is a paint which painted by our daughter, it is painted in 7 days. Not a picture taken by camera. We are so proud of her. 这是我们女儿画的油画，7天就画好了。 不是相机拍的照片。 我们为她感到骄傲。
水利万物而不争,
而万物莫能与之争。
