Do you wanna hook up ?
hook up 只是见面的意思吗？
They are so aggressive! Do they have hearts of steel or something?
heart of steel ？钢铁的心？这是好的是不好的意思呢？

Question

Do you wanna hook up ? 
hook up 只是见面的意思吗？ 
They are so aggressive! Do they have hearts of steel or something? 
heart of steel ？ 钢铁的心？ 这是好的是不好的意思呢？

Answer

explained by Frederick Appell:
http://answers.yahoo.com/question/index?qid=20110609062803AACj60b