a twin sister meaning in Chinese

双胞胎姐姐/妹妹

“ do you have a twin sister ？ ' cause i ' ve seen you here before
“你有一个双胞胎姐姐吗？因为我以前在这里见过你. ”
So you have a twin sister
你有一个孪生姐妹
She has a twin sister , lucy . she looks quiet , and lucy looks more outgoing
她有一个孪生的姐姐，露西，她看上去内向，而露西看上去更外向。
He finds yan is different in her photos . he begins to suspect her , yet he doesn t know yan has a twin sister
在照片中，他发现面前的洛茵不像洛茵，他开始怀疑，但是他不知道洛茵有个孪生姐姐洛玲。