你只消给我封信我定能来帮你: just write to let me know and i am sure to come to help you
来回: 1.(往复一次) make a round trip; make a return journey; go to a place and come back 短语和例子打来回儿 make a round trip; 从我家到学校来回要走半小时。 it takes half an hour to go on foot from my home to my school and