约翰认为，他在演讲比赛中所取得的成功是由于全体老师的帮助和自己刻苦学习英语的结果。
John contributed his success in the speech contest to the help of all the teachers and his hard work at English.
约翰认为，他在演讲比赛中所取得的成功是由于全体老师的帮助和自己刻苦学习英语的结果。
John contributed his success in the speech contest to the help of all the teachers and his hard work at English.
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