我想知道這幾句的差別 ??? - 英檢

1.)

System requires a good DC convert in order to provide a higher voltage which

is used to drive the system core.


2.)
System requires a good DC convert in order to provide a higher voltage used

to drive the system core.



3.)
System requires a good DC convert in order to provide a higher voltage to

drive the system core.

4.)
System requires a good DC convert in order to provide a higher voltage for

driving the system core.





以上四句是否文意及文法都沒有錯誤呢? 我想知道這幾句的差別

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