敝帚自珍

value one's own old broom - cherish something of little value simply because it is one's own

必需品, 碧血, 必要, 必要条件, 必要性, 毕业, 毕业典礼, 毕业生, 裨益, 庇荫, 闭音节, 必由之路, 庇佑, 碧玉, 闭元音, 避孕, 臂章, 币值, 币制, 避重就轻, 壁助, 篦子, 跛足, 砭, 编, 蝙, 鞭, 边, 笾, 边币, 鞭策, 鞭长莫及, 编程, 鞭笞, 鞭虫, 边陲, 编次, 鞭打, 编导, 边地,