The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them

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Themedicinehasmanyfunctions,__areunknowntousASOMEOFWHICHBthatsomeofthemCofwhichsomeofthemdwhcihofthe

The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them
The medicine has many functions,__are unknown to us
A SOME OF WHICH
B that some of them
C of which some of them
d whcih of them

The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them
A,some of which
The medicine has many functions, some of which are unknown to us.
医药功能很多,其中一些功能对我们来说是未知的.
some of which引导定语从句
some of which 等同 some of them
因此,B多了that
C多了of which
D语义不通

B不需要逗号,C两个of不对,D语义不对,这药有许多功能,我们对这些功能一概不知。

A
some of 一些
which指代前面的“The medicine” 并在后面引导了一个定语从句

A some of which引导的是一个定语从句