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。
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。
What did Peter lose in Grade 7?
彼得在七年级时失去了什么？
I joined the basketball team when I was in Grade 7.
我七年级时加入了篮球队。
The Class 1, Grade 7 students took some photos of their pets.
七年级一班的学生拍了一些他们宠物的照片。
I live in Shenzhen, and I am in Grade 7. I have short black hair and black eyes.
我住在深圳，我上七年级。我长着短短的黑头发和黑眼睛。
All the students and teachers from Grade 7, 8 and 9 took part in the sports events.
所有七、八、九年级的老师们和同学们都参加了比赛项目。
The Class 1, Grade 7 students in the English Club are making a display about different festivals around the world.
参加英语俱乐部的七年级一班的学生们正在做一个关于世界各地不同国家的节日的展览。
The Class 1, Grade 7 students in the English Club are making a display about different festivals around the world.
参加英语俱乐部的七年级一班的学生们正在做一个关于世界各地不同国家的节日的展览。
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