共用電話的好處與壞處英語作文

　　Advantage and disadvantage of college room-mates sharing one phone in dormitory.

　　This is of course from different point of view, from user side, it is most preferred that one can has his own phone extension for convenience, especially for those feature phones that work under centralised PABX (Private Automatic Branch eXchange) you can leave short message, voice mail, and can make conference call between parties.

　　The disadvantage is then from the colleage management that such expansion in extension lines will cost a lot of moeny and therefore should be avoided unless they have got funding enough to do endless investment.

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