mean position的用法和樣例：
例句
- The gyro vertical utilizes a gyroscope as an integrating device to obtain the average position of a pendulous gravity reference.
垂直陀螺利用一個陀螺儀作為積分裝置以得搖擺不定的重力基準線的平均位置。 - Moving the ailerons out of their trimmed position causes the airplane to ratote and change attitude.
轉動副翼離開配平位置，致使飛機轉動並改變姿態。
