Researchers are looking at how new technology may be delaying the point which college-bound students truly become independent from their parents.
请问这里可以将which改成when吗?答案是在which前面加上at
at which和when都可以引导定语从句,修饰表示时间节点的the point. 但用when引导定语从句,读者需要判断when究竟是定语从句还是时间状语从句,容易引起误解。而用at which则一目了然,为定语从句。另外,介词+which引导定语从句在语体上要比关系副词引导定语更为正式。所以,介词+which引导定语从句还是用关系副词引导并不是随意的,而是有所考虑的。