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Substitute teachers fill in when your regular teacher is sick.
你平日的老师生病时,就会有代理的代课老师.
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If she was a regular teacher then I think a lot more would have been done.
如果她是正式老师,家长的意见会更大.
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。