During the year, I was a primary school English teaching fourth grade and fifth grade, at the same time as the school ninth-grade physical education tasks, work full and no shortage of challenges.
在这一年里，我担任小学英语四年级和五年级的教学工作，同时担任学校校九年级的体育课任务，工作充实而不乏挑战。
Robert Faris of the University of California, Davis, and colleagues tracked eighth -, ninth - and 10th-grade students during the school year.
加利福尼亚大学戴维斯校区的罗伯特·法利斯和他的同事们跟踪研究了一学年八年级、九年级和十年级的学生。
Robert Faris of the University of California, Davis, and colleagues tracked eighth -, ninth - and 10th-grade students during the school year.
加利福尼亚大学戴维斯校区的罗伯特·法利斯和他的同事们跟踪研究了一学年八年级、九年级和十年级的学生。
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