Through integrated usage of multiple-source information, data fusion can get more objective and intrinsic knowledge of certain object or target.

Conclusion: With the integrated usage of ultrasonic methods, higher accuracy of differential diagnosis for benign and malignant salivary glands tumors may be obtained.

The mode of pragmatic inference is not a usage of single deduction or induction, but a integrated usage of various inference ways, so the research on the form of pragmatic inference is meaningful.