a hollow under the arm at the shoulder
腋,腋窝,胳肢窝。亦称<Bold>AXILLA</Bold>.
〈非正式,主北美〉 令人厌恶的地方;乱七八糟的地方
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they call the region the armpit of America. 他们把那个地区称为美国的龌龊旮旯。
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up to one's armpits chiefly US deeply involved in a particular unpleasant situation or enterprise 〈主北美〉 深陷麻烦(或事业困境)的the country is up to its armpits in drug trafficking. 这个国家陷入了贩毒的泥潭