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来源：雅诚德英语网
There is nothing to guarantee that everybody is willing to make the effort; there is no assurance that the learner will have any adequate return for his toil.
没有什么可以保证每个人都愿意付出努力；学生的辛苦学习是否能得到适当的回报，这是没有把握的。
There is nothing to guarantee that everybody is willing to make the effort; there is no assurance that the learner will have any adequate return for his toil.
没有什么可以保证每个人都愿意付出努力；学生的辛苦学习是否能得到适当的回报，这是没有把握的。