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These various courses all seemed insuperably difficult to the student.
这些课程对于学生来说好像太难了.
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"these various courses all seemed insuperably difficult to the student"
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。