推荐回答（4个）
第一句dedicate to而不是in
第二句改为teaching proposes，envelopement你是想说development吧？
第二段第一句改为institutions，take part 后面加 in
最后不要用a high quality of scholarly level，因为需要的是“学术水平”而不是“高质量”。而且水平只有高低只说，而没有质量之说，因此建议改为extremely high academic level。你查柯林斯词典就知道scholarly不能这么用。
纠正一下 语法问题
1 为什么 since 前面 是句号?建议改为逗号 另外 把since 改为 for
are 改为 is teach 改为 teaching
Those teachers who dedicate themselves in basic education, virtually, don't need to attend courses to update their knowledge.，for their teaching propose is mainly to increase students' all-round envelopment rather than just teaching them knowledge.
2 because 前也应该是逗号
to take part改为 have
need是个情态动词，不需要S三单形式。TAKE part in是个固定词组。IN不能少。dedicate to也是词组。envelopment应该是development（发展）吧。
虽然是英语专业的，但是还是毕业丢了好久。大概就这些了。
propose 加S，或者后面是IS ,个人觉得since改成because 比较好，或者since前用逗号。
take part IN, take part 后面不加宾语。
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