关于第二点，怒气底主要原因与动机有三。

For the second point; the causes and motives of anger, are chiefly three.

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研究表明，涡轮泵不对称以及发动机与机架之间连接刚度弱是引起推力偏心和基频固有频率偏低的主要原因。

It is shown that the offset of propulsion force and the lower natural fundamental frequency are caused by asymmetry of turbopump and weakness of connection stiffness between propulsion and frame.

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人的需要是驱使人们行动的最终原因，是一切行为与活动的目的与内在动机。

Human needs are final reasons for human behaviors, are purposes and internal motives of all behaviors and activities.

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