於的用法和樣例：
例句
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在加利福尼亞居住的好處就在於氣候宜人。
The beauty of living in California is that the weather is so good.
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會(huì )議在星期二和星期四於大禮堂舉行。
The meetings are on Tuesdays and Thursdays in the main hall.
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他遲到了－－很可能是由於交通阻塞耽誤了。
He's late he's probably stuck in a traffic jam.
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我們的科學(xué)家在宇宙探索中處於領(lǐng)先地位。
Our scientists are leading the way in space research.
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這項工作終於快要完成了。
The job is at last nearing completion.
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經(jīng)過(guò)千辛萬(wàn)苦這部詞典才終於得以問(wèn)世。
It's been a long haul but at last this dictionary is published.
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她從最低的位置干起，通過(guò)努力終於當上了公司的經(jīng)理。
She started at the bottom and worked her way up to become manager of the company.
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直線(xiàn)AB與直線(xiàn)CD相交於E點(diǎn)。
The lines AB and CD intersect at E.
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