swore
[swɔr, swor]
v.
诅咒，咒骂( swear的过去式 );
（使某人）就…宣誓;
郑重承诺;
发誓要;
例句:
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They swore their allegiance to the USA and received their naturalization papers.
他们起誓忠诚于美国，随后就接到了批准他们入籍的文件。
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He swore in Spanish, another indication that he was rattled.
他用西班牙语破口大骂，这再次表明了他极为烦躁。
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Kelly swore quietly, looking at the deep cut on his left hand.
凯利看着自己左手上深深的伤口，嘴里暗骂了一句。
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They swore vengeance and began to prepare for war.
来自K. Crossley
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But BP executives swore they would not give up.
来自VOA
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That's not to say that he swore off sex.
来自NEWYORKER