throw out one's chest; stick out one's chest; 挺起胸膛
slit a pig's throat and cut open its chest 杀猪开膛
bore or barrel (of a gun); 枪膛
stove chamber; 炉膛
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)