進(jìn)行對(duì)比：
    The advantages for A outweigh the disadvantages of…
    Although A enjoys a distinct advantage …
    Indeed , A carries much weight than B when sth is concerned.
    A maybe … , but it suffers from the disadvantage that…
    承上啟下：
    To understand the truth of …, it is also important to see…
    A study of … will make this point clear
    讓步：
    Certainly, B has its own advantages, such as…
    I do not deny that A has its own merits.
    結(jié)尾：
    From what has been discussed above, we may safely drawthe conclusion that …
    In summary, it is wiser …
    In short…