共时和历时是一对重要的概念。
Synchronic and diachronic are a couple of important conception.
并指出本课题还有待进一步深入地做共时和历时探讨。
And pointed out that this project has to need further and deeper research from the synchronic and diachronic Angle.
分别从共时和历时角度分别尝试探讨了其动态性的成因以及量幅表现。
Separately when from synchronic and diachronic Angle attempted to discuss its dynamic origin as well as a quantity performance separately.
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