crust

• Look , the paste has crusted on your sleeve .
  瞧，浆糊都嘎巴在你袖子上了。
• Strains in the earth's crust seem to pile up .
  地壳的应力似乎一直在积聚着。
• There was salt crusted everywhere .
  到处都结着盐皮。
• The snow has crusted over .
  雪在地上结成冰壳。
• Sodium is the sixth most abundant element in the earth's crust .
  钠是地表中含量第6丰富的元素。
• They must have appeared first as crusts and clinkers .
  它们最初必然象面包的外皮和熔炉里的渣块。
• Stratigraphy studies the sequence of the rocks in the earth's crust .
  地层学研究地壳中岩石的层序。
• The crust seals the soil and prevents the evaporation of water .
  这层表皮把土壤封闭，防止水份蒸发。
• They cut straight downwards through the hard, brush covered crust .
  他们穿透长着灌木的坚实的硬土一直向下掘。
• Repeat these steps until the suture line is free of blood and crusts .
  重复以上操作直到缝合处无血和硬痂为止。