That's not vicarious. You're not substituting. It's literal.
这不是替代,你并没有进行替换,它是遵循原义的。
The only thing that SIPC does is replace securities.
它唯一能做的就是替换证券
How do I rea-- replace the expression FOR t of n minus 1? Substitute it in again.
我们怎么来代替t这个表达式呢?,再来替换掉它,t等于。
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