Obviously, at lower levels (grade 7), teachers will have to use Chinese more frequently to ensure students understand.

显然，在较低年级(七年级)，为了确保学生能够听懂，教师会较频繁地使用汉语。

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The conclusion condensed fron this paper will be helpful to the further study of theory about gear error and to keep the accuracy of gear machining stably on grade 7.

本文的结论对进一步深化齿轮误差理论的研究及进一步稳定7级齿轮加工精度是有益的。

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What did Peter lose in Grade 7?

彼得在七年级时失去了什么？

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The poor finish elementary at Grade 6, while the rich continue to Grade 7.

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The best performing guru had a 68.2 percent grade while the worst performing one had a 21.7 percent grade.

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There is some evidence that parents of children at grade 6, 7 and 8 who are doing poorly on academic grades lose the financial support of parents and drop out of school.

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