The formula for calculating displacement of the landing top is derived.

推导了悬点位移的计算公式。

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The dynamical properties of oilwell pump under quasi-steady landing top movement is analyzed using mechanical vibration theory.

应用机械振动理论，对准匀速悬点运动下抽油泵的动力特性进行了分析。

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The disc also behaves as a parachute during descent, ensuring a gentle landing, while the low-hanging control pod keeps it from being too top-heavy.

而且在降落的过程中，飞碟还能充当降落伞来保证平稳落地，而挂在下面的控制箱能够避免头重脚轻。

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In an increasingly global world, White says experience abroad is crucial to landing a top job.

FORBES: Global Strategies: How To Move Your Family Overseas

Mario can stomp, side-flip, travel through pipes, grow twice as large with red mushrooms, and complete a stage by jumping toward and landing on top of a flagpole.

FORBES: Connect

Result: More than one-fifth of Orlando's rental units are vacant, landing it the top spot on Forbes' list of America's Emptiest Cities.

MSN: Orlando, Las Vegas top the list of emptiest U.S. cities