how to say "保姆" and "钟点工" in english?

how to say "暴发户" in english ?

the first writing on italki it's my first writing on italki. what should i write? ...... well, "write about what happened today" i was late again today. bcz the traffic always suck. and our office's air condintioning doesn't work today. it's so hot the whole day. all of us were looking forward to offduty. and then we can go outside to enjoy the cool weather

which part of the expo interest you the most?

can u tell me the different between "how are u doing" and "how are u"? thanks for all your answer. i'll do remeber that "you" but not"u"