across prep.穿過；橫過；在……的對(duì)面/adv.從一邊到另一邊
across the contry 全國
along prep.沿著/adv.向前；一道；一起
along with 同……一起（一道)=in company with=together with
come along 一道
get along/on well with sb./sth.和某人相處得很好；……進(jìn)展很好
go along 進(jìn)步；前進(jìn)；進(jìn)行
You may have some difficulty at first,but you will find it easier as you go along.最初你或許有些困難,但進(jìn)行下去你會(huì)覺得比較容易.
over adv.結(jié)束
（all) over again 再次=once again
over and over/again and again 一再地；再三地；一而再,再而三
=repeatedly; again and again
overall adj.總的；綜合的