let saliva run down from the mouth as long as three chi -- cannot hide one's greed 垂涎三尺
T-square; 丁字尺
folding rule 折尺
slide rule; 计算尺
bronze paperweight 镇尺
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)