Is it, for instance, mostly rock and ice with a few pockets of gas, or is it a loose pile of rubble held together by gravity?
例如，是由大量的石头、冰川和少量的气体构成还是由在重力作用下聚在一起的松散的碎石堆构成。
Anchoring to the surface will probably be necessary, but asteroids are made up of different materials - some solid metal, some piles of rubble and some, a combination of rock, pebbles and dust.
锚定表面可能是必要的，但小行星是由不同材料构成-一些固体金属，一些瓦砾和一些的岩石，鹅卵石和尘埃的组合桩。
It was constructed on rock, using rubble masonry and stood about 48ft. high.
它是一座建造在岩石上，高约48英尺，由毛石砌成的石工建筑。
The Article hereby introduces the design and construction method of rock crib that is used in slope protection instead of rubble masonry, and presents its application in solid engineering works.
文章介绍用石笼代替块石码砌作为边坡防护结构的设计和施工方法以及石笼在实体工程中的应用。
The Article hereby introduces the design and construction method of rock crib that is used in slope protection instead of rubble masonry, and presents its application in solid engineering works.
文章介绍用石笼代替块石码砌作为边坡防护结构的设计和施工方法以及石笼在实体工程中的应用。
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