水平有限，只限在熟悉的状况下有基本的理解力，在理解与表达上常发生问题，无法使用复杂英语。(英国预科分数线)。
Limited User. Basic competence is limited to familiar situations. Has frequent problems in understanding and expression. Is not able to use complex language.
推导了膜生长效率的理论表达式；表观迁移分数的关系式。
Mathematic expressions of film growth efficiency and the relationship between apparent and real transport Numbers have been derived.
提供了分数傅里叶变换定标性的数学表达和物理解释。
This paper give out the physical interpretation of scaling character of the fractional Fourier transform.
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