浮石沉木

Explanation: See "pumice driftwood." 　　Source: Han Lu Jia "straighten out confusing new language," her husband disagree about the honor killing, pumice driftwood, Qunxie the suppression, to direct the music. " 　　Examples: The state of Gu Gong Su Wen, also looks clean, but not from the mouth of ~. ★ Qing Qian, "Wang Shou Feng taste smokers seventy order"