1，a change of pace 节奏变换 (来源：英语分类信息 http://fl.englishcn.com)

    You can’t do these chemistry experiments all day long. You certainly need a change of pace.

(来源：英语麦当劳 http://www.EnglishCN.com)

    2, a far cry from 相距甚远

(来源：英语麦当劳 http://www.EnglishCN.com)

    The published book is far cry from the early manuscript. (来源：英语学习门户网站EnglishCN.com)

    3, and how 的确

(来源：英语图片 http://photo.englishcn.com)

    A: She’s a good dancer. (来源：英语论坛 http://bbs.englishcn.com)

    B: and how.

    4, a matter of time 时间问题 (来源：英语博客 http://space.englishcn.com)

    It is only a matter of time. (来源：英语交友 http://friends.englishcn.com)

    5, a phone call away 一个电话之远，愿意过来帮忙。

(来源：EnglishCN英语博客基地)

    If you need my help, do let me know. Just remember I am a phone call away. (来源：英语e问e答 http://ask.englishcn.com)

    6, a while back 不久以前

    7，all along 一直 (来源：英语麦当劳www.EnglishCN.com)

    I knew it all along.

(来源：英语论坛 http://bbs.englishcn.com)

    8, anything but 绝对不 (来源：英语麦当劳－英语快餐EnglishCN.com)

    I was anything but happy about going.

(来源：英语麦当劳 http://www.EnglishCN.com)

    9, account for 解释 (来源：最老牌的英语学习网站 EnglishCN.com)

    How do you account for it?

(来源：英语麦当劳－英语杂志 EnglishCN.com)

    10, after all 到底 (来源：英语学习门户网站EnglishCN.com)

    A: I’ve just seen the X-rays and your teeth look just fine,

(来源：最老牌的英语学习网站 EnglishCN.com)

    B: I see. Then there is nothing to worry about after all. (来源：专业英语学习网站 http://www.EnglishCN.com)

    11, allergic to 对|……过敏

    Oh man! Something in this room is making my eyes itch. I must be allergic to something. (来源：英语麦当劳－英语快餐EnglishCN.com)

    12, at sb’s service 愿为某人服务 (来源：英语电影下载 http://bt.englishcn.com)

    I am at your service at any time. (来源：最老牌的英语学习网站 EnglishCN.com)

    13, around the clock 24小时不停

    Martha studied around the clock for management exam. (来源：英语麦当劳－英语杂志 EnglishCN.com)

    14, as far as I know 就我所知

(来源：英语问答中心 http://ask.englishcn.com)

    15，at home with 对…..很熟悉 (来源：英语问答中心 http://ask.englishcn.com)

    She is at home with problems like this. (来源：EnglishCN英语问答中心[e问e答])

    16, back out

    1) 退出 (来源：最老牌的英语学习网站 EnglishCN.com)

    A: Wasn’t Bert supposed to sing tonight?

    B: Yes, but he backed out at last minute (来源：英语问答中心 http://ask.englishcn.com)

    2）不履行 (来源：EnglishCN英语博客基地)

    She finally backed out of her promise.

(来源：英语资料下载 http://download.englishcn.com)

    17, be cut out for 天生适合 (来源：英语麦当劳 http://www.EnglishCN.com)

    I’m not cut out to be a hero.

(来源：EnglishCN英语博客基地)

    18, be absorbed in

    She has been absorbed in a horror fiction. I can’t tear her away. (来源：英语麦当劳－英语快餐EnglishCN.com)

    19, be addicted to 对……上瘾 (来源：EnglishCN英语问答中心[e问e答])

    She has been addicted to drugs for years. (来源：英语麦当劳－英语杂志 www.EnglishCN.com)

    20，be attached to 对……有感情 (来源：英语论坛 http://bbs.englishcn.com)

    A: I’m amazed that you are still driving that old car of yours. I thought you would have (来源：英语聊天室 http://chat.EnglishCN.com)

    gotten rid of it years ago.

(来源：英语麦当劳－英语学习门户 EnglishCN.com)

    B: It runs well and I’ve actually been quite attached to it.

(来源：英语资料下载 http://download.englishcn.com)

    21, back up

(来源：专业英语学习网站 http://www.EnglishCN.com)

    1) 累积 (来源：英语麦当劳－英语快餐EnglishCN.com)

    The subway is running behind schedule, and traffic is backed up for blocks. I don’t know if we’ll make the 6:30 show.

    2) 支持

    I’ll back it up.

(来源：英语e问e答 http://ask.englishcn.com)

    22, be bound for 到……地方 (来源：英语聊天室 http://chat.EnglishCN.com)

    The bus is bound for New England. (来源：英语麦当劳－英语学习门户 EnglishCN.com)

    23, be (feel) myself 找到自我

(来源：英语聊天室 http://chat.EnglishCN.com)

    I’m feeling myself again. (来源：英语问答中心 http://ask.englishcn.com)

    24, be burned up 生气

    She was really burned up at the news. (来源：英语麦当劳－英语快餐EnglishCN.com)

    25, be hard up for

    I’m hard up for clothes, but I have a lot of books. (来源：英语麦当劳－英语杂志 www.EnglishCN.com)

    26, be head and shoulders above 好许多 (来源：英语美食指南 http://food.englishcn.com)

    In calculus, Joe is head and shoulders above his classmates. (来源：专业英语学习网站 http://www.EnglishCN.com)

    27，be in the dark 蒙在鼓里 (来源：英语麦当劳－英语杂志 www.EnglishCN.com)

    A: Do you have any idea what his notice is about?

(来源：英语交友 http://friends.englishcn.com)

    B: I’m as in the dark as you are.

(来源：英语麦当劳－英语杂志 EnglishCN.com)

    28，be stuck 卡住了 (来源：英语麦当劳www.EnglishCN.com)

    I can’t get this window open. It’s stuck.

    29, bite off more than one can chew. 贪多嚼不烂 (来源：英语图片 http://photo.englishcn.com)

    A: I hear you’re taking an advanced physics course this semester. (来源：英语电影下载 http://bt.englishcn.com)

    B: I think I’ve bitten off more than I can chew.