...地面 0.18 图2为来自不同地面反射物的光谱曲线，从图可知，雪地（Snow）、白色的沙地（White sand）、干草地（Dry grass）的地面反射光谱较好，混凝土（concrete）次之，沥青（asphalt）较差。
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As wind in dry grass 好似干草地上的风
dry grass powder 干草粉
dry grass for hay 把青草晒成干草
fresh and dry grass 鲜草和干草
semi-dry deteriorated grass farm 半干旱退化草牧场
干草着火了。
A cigarette set the dry grass alight.
一支香烟把干草点燃了。
The dry grass catches fire easily.
干草很容易着火。
They were covered with snow. In their branches were pieces of dry grass and wood left by flood waters earlier in the year.
VOA: special.2010.05.01
The researchers were able to identify asbestos even in places eighty-percent covered by dry grass.
VOA: special.2009.11.17
An extremely dry summer killed the grass, and thousands more died of hunger.
VOA: special.2010.03.18
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