1、
The study on electrostatic waves promulgating in dusty plasmas has become a focal problem.
对其间传播的静电波的研究已成为一个热点问题.
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2、
While they promulgating the Christianity , English was also publicized in China.
他们在传教的同时, 英语也在中国得到了广泛的传播.
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3、
