similarly的用法（当它连接两个句子） 是不是必须连接两个完整的句子?用不用逗号隔开?

"I am a girl .similarly ,she is a girl." =应该使用 (also); 不是 "similarly";不能用来形容同性相似的地方.
更正："I am a girl.She is [also] a girl."
similar 形容词:(a)My house is similar to yours; (b)Our jobs are similar.相似的
副词:similarly =相似（地）
(1)"Mr.X,Y,Z,A,B,C were similarly dressed." =两个句子:(a) Mr.X,Y.Z wore yellow T-shirts.Mr.A,B,C also wore yellow T-shorts.
(2)Similarly a baby's cry is instantly identified by the mother.
(3)He was sick.His father was also sick.=Both father and son were similarly sick (because of AH1N1 flu).