be viewed as 被……看成是
rather than 而不是
on the other 另一方面
link to 把……和……联系起来
rest on 依靠，依赖
established conventions 既有的惯例
it's difficult to see 很难看出
have a clear grasp 对……有清楚的掌握
in a manner 用一种方式
be parallel to 和……平行，和……一样
on the basis of 以……的基础
comment on 评论
it's preferable for sb to do sth 某人最好做某事
rely on 依赖
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