I'm afraid I can't help you just at present-I'm too busy.
很抱歉，我现在帮不了你——实在太忙了。
常用英语短语
at random 随便地，任意地
常用口语句子
Soiled dishes were piled at random.
脏碟子胡乱地堆放着。
Please open a book at random.
请随便打开一本书。
He asked questions at random.
他胡乱问些问题。
常用英语短语
at rest 静止，安静；解决
常用口语句子
Her words set my mind at rest.
她的话使我放心。
The waves of the sea are never at rest.
大海的波涛永不停息。
You can keep your mind at rest about the matter，as it's all set.
你放心吧，这件事已经解决了。
常用英语短语
at sea 在海上；茫然，不知所措
常用口语句子
I'll spend three months at sea.
我将在海上度过三个月。
I'm all at sea； I've no idea how to repair cars.
我手足无措，不知道怎样修理汽车。
She tried to understand the instructions，but she was completely at sea.
她费尽力气想看懂那些说明文字，却全然不知所云。
instruction [?n'str?k?n] n.用法说明
常用英语短语
at stake 在危急关头，在危险中，冒风险
常用口语句子
This decision puts our lives at stake.
这么一决定，我们的生命就吉凶难卜了。
Our children's education is at stake.
我们孩子的教育好坏无法预料。
The life of the sick man is at stake.
病人的生命在危急中。
常用英语短语
at one's disposal 供某人任意使用，可自行支配
常用口语句子
Students have a well-stocked library at their disposal.
学生有个藏书丰富的图书馆，非常方便。
The firm put a secretary at my disposal.
公司给我配备了一名秘书。
Mark had a lot of cash at his disposal.
马克有很多现金可自行支配。
常用英语短语
at table 在吃饭
常用口语句子
Children must learn to behave at table.
小孩吃饭时必须有规矩。
They were at table when we called.
我们去拜访时，他们正在吃饭。
You shouldn't speak loudly at table.
吃饭时你不该高声讲话。
常用英语短语
at the beginning/start在开头
常用口语句子
The cold weather broke at the beginning of April.
寒冷的天气到四月初开始变暖了。
We're going to New York at the beginning of July.
我们七月初要去纽约。
However the reform is hindered at the beginning.
但是，改革一开始就受到阻碍。
reform [r?'f??m] n.改革，改造
hinder ['h?nd?(r)] v.阻碍，妨碍
常用英语短语
at the cost of 以……为代价
常用口语句子
It is not good for young ladies to keep slimat the cost of their health.
年轻女士牺牲健康来减肥是不可取的。
She saved him from drowning，but only at the cost of her own life.
他遇溺时她把他救了，但却牺牲了自己的生命。
He succeeded only at the cost of his health.
他成功了，但身体却垮了。
常用英语短语
at the expense of 由……付费，以……为代价
常用口语句子
His fame was bought at the expense of health and happiness.
他牺牲了健康和幸福来获得名声。
He built up a successful business but it was all done at the expense of his health.
他创建的企业很成功，但这一切却以损害他的健康为代价。
He devoted his time to football at the expense of his studies.
他全然不顾学习，把全部时间都用于踢球。
常用英语短语
at the latest 最迟
常用口语句子
I should be back by 11 o'clock at the latest.
我应该最晚11点回来。
Passengers should check in one hour before their flight time at the latest.
乘客最迟应在班机起飞前一小时办理登机手续。
I'll give you a definite answer on Friday atthe latest.
我最迟星期五给你一个确切的答复。
常用英语短语
at the mercy of 受……支配，任凭……摆布
常用口语句子
The ship was at the mercy of the storm.
那只船在暴风雨中失去控制。
They are absolutely at the mercy of providence.
他们完全听天由命。
The picnic was at the mercy of the weather.
去不去野餐要由天气决定。
absolutely ['?bs?lu?tl?] adv.绝对地，完全地
providence ['pr?v?d?ns] n.天意，天佑
常用英语短语
at the moment 此刻，目前
常用口语句子
I'm afraid she's not here at the moment.
我恐怕她现在不在这儿。
The number is engaged at the moment.Tryagain in five minutes.
这个号码现在占线，五分钟后再试试吧。
He's unemployed at the moment and has been for over six months.
他目前失业，已经有半年多了。
常用英语短语
at the outset 在开头时
常用口语句子
At the outset of her career she was full of optimism but not now.
她事业伊始十分乐观，但现在已今非昔比了。
You made a mistake at the outset.
你从一开始就错了。
At the outset，it looked like a nice day.
开始的时候，天看上去很晴朗。
optimism ['?pt?m?z?m] n.乐观，乐观主义
常用英语短语
at the outside 最多，充其量
常用口语句子
With tips I can earn ā150 a week，at the very outside.
连小费在内我每星期最多能挣150英镑。