查名言出处懒惰像生锈一样，比操劳更能消耗身体；经常用的钥匙，总是亮闪闪的。
提问者：匿名
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mth_zxy回答:
确实这句话是富兰克林说的。
英文原句是：Sloth, like rust, consumes faster than labor wears, while the used key is always bright，利用Google book search，可以搜索到：
A Dictionary of American proverbs 作者：Wolfgang Mieder,Stewart A. Kingsbury,Kelsie B. Harder
其中The used key is always bright 这个英文谚语的来源（该书P575）有：
The used key is always bright. Vars.a) a used key is the brightest. (b) Sloth, like rust, consumes faster than labor wears, while the used key is always bright. Rec. dist.: U.S. 1st cit.: 1561 Kitt Hath Lost Key in Extra Stationers’ Co., ed. Collier; US 1744 Franklin, PRALmanac. 20c. coll.: ODEP 857, Whiting 243, Stevenson 2411:5.
前一出处a，是一首中世纪名歌。具体见：http://www.cddc.vt.edu/host/imev/record.php?recID=1824.8。
后一出处b，即Benjamin Franklin的PRALmanac，后者全名：Poor Richard’s Almanack（有时也作Almanac）。百度百科有词条介绍这本畅销一时的书。此书的英文介绍见：http://en.wikipedia.org/wiki/Poor_Richard's_Almanack，Poor Richard是富兰克林的笔名。
回答时间:2012-11-15 10:12:18
关键词:名言出处 南宁职业技术学院
a) a used key is the brightest. (b) Sloth, like rust, consumes faster than labor wears, while the used key is always bright. Rec. dist.: U.S. 1st cit.: 1561 Kitt Hath Lost Key in Extra Stationers’ Co., ed. Collier; US 1744 Franklin, PRALmanac. 20c. coll.: ODEP 857, Whiting 243, Stevenson 2411:5.