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1704922961
在某方面：
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1704922963
She was quite clever at drawing．她擅长画铅（钢）笔画。
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1704922965
I was never any good at trigonometry．我的三角学一直学得不好。
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1704922967
She wasn’t much at letter-writing．她不太善于写信。
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He’s a genius at chemistry．他在化学方面是天才。
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He is an expert at repairing clocks．他是修钟专家。
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1704922973
She was working hard at two new songs．她在用心写两首新歌。
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1704922975
引起短语作表语，表示状态或动作：
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1704922977
The country was at peace then; now it is at war．这国家那时处于和平时期，而现在则在打仗。
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1704922979
I knew she was not at ease．我知道她心情不安。
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1704922981
Summer is at its height．正处于盛夏时期。
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1704922983
He knew she was at her worst．他知道这正是她情绪最低的时候。
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1704922985
Mary was at the piano．玛丽在练钢琴。
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They were at their meal．他们正在吃饭。
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1704922989
We were at school together．我们一块儿上学。
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1704922991
引起短语作状语，表示价格、数量和速度等：
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1704922993
I’ll buy the furniture at that price．我将以那个价格买这件家具。
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1704922995
He sells the cloth at a dollar a yard．他卖那种布，一美元一码。
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The interest is at 20 per cent．利息是20％。
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The train was going at its full speed．火车正全速前进。
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1704923001
I had a small room, at a cost of five dollars a night．我租了一间小房，每晚五块美金。
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Please come at your earliest convenience．请在方便的情况下尽早来。
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109 at—in—on
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1704923008
这三个介词都可用来表示地点。
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