in theory
英 美
in theory I'm on call day and night.
理论上,我不分昼夜随叫随到。
in theory, these machines should last for ten years or more.
从理论上讲,这些机器应能用十年以上。
in theory, the buyer could ask the seller to have a test carried out.
在理论上,买方可以要求卖方进行一次产品检测。
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