T rim: trim to relieve control pressure and maintain altitude and airspeed.

调整片：减少杆力以保持高度和速度。

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You must manage the throttle position to climb, descend, or maintain altitude.

你必须管理节气门位置攀登，下降，或保持高度。

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The effects of altitude aside, some sports engineers maintain the ball's unusual movements can still be chalked up to its smooth stitchless design.

除了海拔的影响，一些体育工程师记录下了这款球不寻常的动态，这些动态仍会被记录下来用于无缝平滑设计。

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In general, when a stick shaker activates, pilots are taught to apply full power and maintain the plane's altitude or lower the nose, a captain for a major airline told CNN.

CNN: Source: Wrong move possibly made before Buffalo plane crash

Further piquing the imagination are the minority tribes who live among the high-altitude valleys, struggling to maintain their ethnically independent identities.

BBC: Shopping in Chiang Mai