On a land vehicle the speed input is usually obtained from the speedometer drive system.
对地面运动体，输入速度通常由测速计的驱动系统来供给。
According to DEA validity, the paper analyses the reasons for DEA invalidity from land input-output efficiency, and puts forward Suggestions to use urban land effectively.
根据DEA有效性值，从土地投入产出两个方面分析了非dea有效年份的原因，并根据计算结果提出了有效利用城市土地的建议。
The source rocks are mainly formed in interdeltaic bay and lower delta plain environments where intermediate subsidence is kept and there is little input of the sediments from land.
烃源岩主要形成于三角洲间湾和下三角洲平原，这里沉降幅度中等且陆源供给受到限制。
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