speak or sing alternately 对口 收藏 symmetrical triangle multi-period ambiguity functi 对称三角多周期模糊函数 收藏 .
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Use correct, the book of speak or sing alternately is quite important.
使用一套正确的， 对口的书籍是相当重要的。
The administration that develops speak or sing alternately adequately to help the work urges action, those who ensure emigrant speak or sing alternately assists the task is satisfactory finish.
充分发挥对口支援工作的行政推动作用，确保移民对口支援任务的圆满完成。
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