Times are bad, the market is dead as a doornail.时势不好, 市面清得不成话.It lay there with its eyes closed, dead as a doornail.它躺在那里眼睛闭着, 确实死了.The treaty may be considered to be as dead as a doornail.这项条约可以认为是完全作废了....
The guard dog was now in kennels as it was not aggressive.这条看门狗不好斗，因此正在养狗场受训。We put the dog in kennels when we go away.我们外出时把狗寄养在养狗场。He left his dog in a kennels when he went on holiday.他外出度假时把狗交给养狗场照管....
We need 3 cubic yards of sand.我们需要3立方码的沙子。Detritus usually consists of gravel, sand and clay.岩屑通常是由砂砾, 沙和粘土组成的.The white sand reflected the sun's heat.白色的沙子能反射太阳的热量。The sand massed to form a dune.沙积集起来成了沙丘.Silane co...