同根派生 cover crop相关词英汉例句European vetch much cultivated as forage and cover crops.欧洲的一种野豌豆，通常被用来制草料和覆盖作物。It is generally advantageous to sow pasture seeds with a companion grazing nurse crop.一般在播种草种时，同时播种放牧保护作物是有好处的。cover crop更多例句