He had to spend about six months in a class with younger students.
他不得不在一个比他小的学生的班上呆了大约六个月。
They simply think science is too difficult for lower-grade students younger than ten years old.
他们想当然地认为科学对不足10岁的儿童太难了。
They simply think science is too difficult for lower-grade students younger than ten years old.
他们想当然地认为科学对不足10岁的儿童太难了。
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