在线辅导可供查阅。

An online tutorial is provided.

《牛津词典》

在线辅导课程每小时的费用在20到25美元之间。

Online tutoring costs between twenty and twenty-five dollars an hour.

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胡珀：今天的儿童参加在线辅导时非常自信，他们非常有参与感、掌控感。

TOM HOOPER: "Children today feel very confident online, they feel very engaged, they feel very in control."

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