第二部分 利用介词扩大词组量
第一章 基本介词研究
L ESSON 1 基本介词 AT
AT的基本含义是location，其详细词义分类整理如下：
1. 在…地方；处于…的状态（表位置、状态、条件、时间、年龄）
EX） He studied at Harvard University. He died at the age of ten. He is at table. I am at a loss what to do. We are at peace with the neighboring countries. I will leave it at your disposal.
2. 在…方面（表能力、性质的对象）
EX） He is a genius at music. She is good at knitting.
3. 因为（表原因、理由）
EX） We were surprised at the news.
4. 朝…；按照（表目标、方向）
EX） He fired a gun at the intruder.
5. 在…位置（表度数、价格）
EX） The thermometer 〔mercury〕 stands at 30 degrees centigrade. It is valued 〔priced〕 at 5 dollars.
6. 以…的方式
EX） He invested at the expense of his fortune.
LECTURE 181 基本介词 AT 1
词组讲解
1. at a loss for words / at a loss ** 不知说什么好，难以用言语表达；感到困惑；不知所措
解 习语；词义溯源：处于［失去话语（a loss for words）］的状态
例 I really appreciate this. You guys are wonderful and I wish I could put into words how much I admire you for being so thoughtful and generous, but I'm really at a loss for words. I know everybody says “thank you” a hundred times a day without thinking about it, but when I say “thank you” this time, it comes from the bottom of my heart. Thank you, thank you all!
2. at a premium ** 溢价，在票面价值以上；稀有的
解 习语；词义溯源：处于［溢价（premium）］的状态
例 Due to the cool, rainy summer, the apple harvest is estimated to have been less than half of the usual yearly average. Consumers will find it hard to get good apples and will pay a high price for those they do find. “Apples will be sold at a premium this year,” said Kroger Supermarket's general manager.
