这个句子的主干是a process is evaluated by a group of experts,而by which something proposed则是修饰主语a process的从句,你可以把它看成something is proposed by a process,就可以明白by的作用了!
这句中的第一个by是什么意思,句子中起什么作用?
这个句子的主干是a process is evaluated by a group of experts,而by which something proposed则是修饰主语a process的从句,你可以把它看成something is proposed by a process,就可以明白by的作用了!