1) It would certainly be (unnatural) for somebody to do something. But it would be equally unnatural for somebody to do something.

　　对某人来说做某事肯定不正常，但同样，对某人来说做某事也不正常。

　　2) The idea of doing something is (alarming) to somebody. It is even more (alarming) to do something.

　　对某人来说做某事的主意是令人担忧的。但做某事则更令人担忧。

　　3) While it’s true that …. It’s equally true that…

　　然而，…是正确的，…也同样正确。

　　4) Obviously, it has its drawbacks as well as merits.

　　显然，它既有优点也有缺点。