The audio part of the video entertainment is delivered to each individual passenger seat on selected channels of audio entertainment system and also may be connected to the PA system speaker.

A. 当施加在相同方向的压力值大于预设值时开始工作。

B. 当适用于反方向的压力值大于极限值时开始工作。

C. 当施加在反方向的压力值大于预设值时开始工作。

A. It is not recommended that we remove the damage prior to submitting information to Boeing,such as dents on metallic and composite structures, and delamination or punctures to composite structure.

B. If the removal of dents on metallic and composite structures, and delamination or punctures to composite structure is approved by SRM,CMM,or SB,it is preferable to remove the damage prior to submitting information to Boeing.

C. It is recommended that we remove the damage prior to submitting information to Boeing,such as dents on metallic and composite structures, and delamination or punctures to composite structure.

A. Make sure that chemical compound are not near the engine nozzle.

B. Make sure that solvents are not near the engine exhaust.

C. Make sure that there＇s no isopropyl alcohol near the engine exhaust port.

A. 戴上氧气面罩并进行呼吸，确认其供氧正常。

B. 在佩戴氧气面罩前进行深呼吸，确认血液中氧气充足。

C. 为确保供氧正常，请不要摘下氧气面罩并进行呼吸。

A. 把螺帽拧松一圈。

B. 拧紧螺帽半圈。

C. 拧紧螺帽一圈。

A. Materials used to repair layered structures must keep the rigidity, gravity, aerodynamic or electronic properties of the original assembly.

B. The materials used in the repair of laminate structures must preserve the strength, weight, aerodynamic characteristics, or electrical properties of the original assembly.

C. Materials that are used for fixing the layer structures must maintain the intensity, weight, aerodynamic or electrical properties of the original assembly.

A. 对于非FAA批准的飞机，其声明要写在飞行手册中。

B. 对非FAA批准的飞机飞行手册，做如下声明。

C. 在非FAA批准的飞行手册中要包括以下声明。

A. AD describes corrective action, e.g. inspection, repair or maintenance, which may be listed by AD or included in another document, e.g. manufacturer＇s Service Bulletin that acts as reference in the AD.

B. The corrective action prescribed by the AD, such as an inspection, repair, or modification, may be detailed in the AD itself or may be contained in another document, such as manufacturer＇s Service Bulletin, which is referenced in the AD.

C. AD details the requirements for inspection, repair or modification described in corrective action, or it may be contained in another document, such as Service Bulletin referenced in AD.

A. Sentence forms shall be simple and direct, avoiding the obvious, the elementary and discussions of theory except where essential for practical understanding and application.

B. Sentence forms shall be simple and direct, avoiding the obvious and the elementary, and omitting discussions of theory except where essential for practical understanding and application.

C. Sentence forms shall be simple and direct so as to avoid the obvious and the elementary, and to omit discussions of theory except where essential for practical understanding and application.

A. 许多高度表都包含了连接机构，它们不仅可以使指针在游标上移动，还可以旋转数字计算器。快速参考窗口使飞行员可以简单地读取以英尺为单位的数字高度。在快速爬升或下降时旋转数字或滚筒式计算器的运动使数字难以阅读或无法阅读。此时可以用经典的时钟式表做基准。

B. 许多高度表都包含了连接机构，它们不仅可以使指针在游标上移动，还可以旋转数字计算器。快速参考窗口使飞行员可以简单地读取以英尺为单位的数字高度。在快速爬升或下降时旋转数字或滚筒式计算器的运动使数字难以阅读或无法阅读。此时可以用经典的时钟式表做基准。

C. 许多高度表都包含了连接件，它们不仅可以使指针在刻度盘上移动，还可以旋转数字计数器。快速参考窗口使飞行员可以简单地读取以英尺为单位的数字高度。在快速爬升或下降时旋转数字或滚筒式计数器的运动使数字难以阅读或无法阅读。此时可以通过经典的钟表式指示来进行参考。