▲举例:
for example, for instance, take…for example, such as, like，
and so on，so on and so forth, and so on and on and on, etc.等。
▲说明:
that’s to say，in other words，namely,等。
▲因果：
so，for，therefore，as a result，thus，because，because of, thanks to…，owing to…, due to ……等。
▲递进:
then，besides，in addition, furthermore，moreover, what’s more等。
▲顺序:
firstly, secondly, thirdly, finally；in the first place, in the second place, in the third place, lastly
to begin with, then, furthermore, finally；to start with, next, in addition, finally；
first and foremost, besides, last but not least；most important of all, moreover, finally（以上为时间顺序）
