I cannot understand the subject exacly of this phrase (DL used in romanization)
我是2002年生的 or 我是2002年来的

因为我不太懂英文

抱歉我只看得懂第三句

我家有养狗

Your second "nian" in the first sentence may be sheng (生，meaning born) or lai (来，meaning came)

I agree with songyuanyao that "DL" may very well be "di". "Di San ju" is "第三句" which means "the third sentence"