Translation of inject in Spanish

We felt a little dumb and waited for the hot water. The boiler seemed not to work and we started to become upset. We asked the technician to come once again and he admitted his mistake.
Hey. You are online! Pollution means that the air is filthy and that it is hard to breathe. I'm getting much better at German, so please correct me when I am wrong in my language. You're English is actually great.
My sister just moved to Boston, Massachusetts and I visited her for two days only. This means that I do not know the city but what i saw of it was really nice. I will visit her next month or so.