at least...if not more 如果不是更多,至少也......
It will take at least an hour, if not more. 这要花至少一个小时,如果不是更多的话。
at one time 曾经、以前
At one time, smoking was allowed here. 以前这里可以抽烟。
at present 现在
I'm not working at present. 我现在没有工作。
at that very moment 就在那个时候
At that very moment, the phone rang. 就在那时,电话响了。
at the ball 在舞会上
I saw her at the ball last night. 我昨晚在舞会上看见她了。
at the beginning of 在......的开始
I arrived at the beginning of the movie. 我是电影开始时到的。
at the bottom of 在......的底部
His name was written at the bottom of the page. 他的名字写在那页的底部。
at the cost of 以......为代价
He completed law school at the cost of his health. 他以健康为代价完成了法学院学业。
at the crossing 在十字路口
Turn left at the crossing. 在十字路口左转。
at the invitation of somebody 应某人邀请
He visited China at the invitation of the government. 应政府邀请,他访问了中国。
at the latest 最迟、最晚
I will finish the work at the latest by Friday. 我最迟会在周五之前完成工作。
at the most 最多
I can give you at the most 5 dollars. 我最多只能给你五美元。
at most 最多、至多 (偏口语)
There were at most 20 people at the party. 派对上至多有二十人。
at the price of 以......为代价
Success often comes at the price of health. 成功往往以健康为代价。
at the risk of 冒着......的危险
He told me the secret at the risk of losing my trust. 他冒着失去我信任的危险告诉我这个秘密。
at the same time 同时
They arrived at the same time. 他们同时到达。
at the sight of 看见
She burst into tears at the sight of the injured dog. 她一看见受伤的狗就大哭起来。
at the speed of 以......的速度
The plane was cruising at the speed of 500 mph. 这架飞机以每小时五百英里的速度飞行。
at the thought of 当......想到
I shudder at the thought of crossing the desert alone. 一想到独自穿越沙漠我就不寒而栗。
at the top of the voice 用最高的声音
He shouted at the top of his voice. 他用最大的声音喊道。
attach to 附着于,连接到
Use tape to attach the photo to the wall. 用胶带把照片粘贴到墙上。
attempt to do 尝试去做、企图去做
I attempted to fix the car but failed. 我试图修理这辆车,但失败了。
attend to something 注意;对......关注
Please attend to your studies. 请专心学习。
attitude to(towards) something 对......的态度
What's your attitude towards cheating? 你对作弊持什么态度?
attract one's attention 吸引某人注意力
The loud noise attracted my attention. 强烈的噪音吸引了我的注意力。
a great number of,a large number of 许多(接可数名词复数)
A great number of students are studying English. 许多学生正在学习英语。
She received a large number of cards on her birthday. 在生日时她收到了大量的贺卡。
a great many 非常多(接复数)
A great many people showed up for the party. 很多人在派对上出现了。
I've read a great many books on the subject. 我已经读了大量关于这个主题的书籍。
a bit of 一点(接不可数名词)
I just want a bit of your time. 我只要一点你的时间。
a bit 一点(接形容词)
The test was a bit difficult. 这个测试有一点难。
a bunch of 一束、一捆
She bought a bunch of flowers. 她买了一束花。
a certain 某一个(接可数名词单数)
A certain smell reminds me of my childhood. 某种气味让我想起了我的童年。
a copy of 一份(报纸等)
Can I have a copy of today's newspaper? 我可以要一份今天的报纸吗?
a couple of 几个、一些、三两个(接可数名词复数)
There are a couple of apples on the table. 桌子上有几个苹果。
a crowd of 一群、许多
A crowd of people waited at the train station. 一群人在火车站等候。
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