Comparative planetary geology is a frontier discipline on exploring nature and evolution of human being, and a key to reaching the three major goals of Solar system exploration.
比较行星地质学是人类认识自然和人类本身形成与演化的前缘学科，是实现太阳系探测三大科学目标的主要手段。
Their three major functions are to fulfill discourse goals, to identify social identity and to restrict discourse contents while reinforcing institutional power.
这些话语标记语在刑事审判话语中起着实现话语目的，显示社会地位，强化机构权力和限定话语内容的作用。
Their three major functions are to fulfill discourse goals, to identify social identity and to restrict discourse contents while reinforcing institutional power.
这些话语标记语在刑事审判话语中起着实现话语目的，显示社会地位，强化机构权力和限定话语内容的作用。
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