All official technical names that have more than three nouns are written in full the first time that they occur.Then, in the remaining parts of the text, the related approved abbreviations are used.

A. The manufacturer shall prepare all text in either one or two columns with justification at his own discretion , but, two columns are preferable for readability.

B. Manufacturers shall prepare all text both in one and two columns separately; however, two columns are better for reading.

C. According to the manufacturer＇ explanations, all text shall be prepared in one or two columns; however, two columns have better visual effect.

A. 前区域空气调节支管减少空气量来分配前空调区域传送的噪声。

B. 前区域配平空气消音器减少输送到前空调区域的空气分配噪声。

C. 前区域调整片的空气套管输送空气到前空调区域，以减弱噪声分布程度。

A. Advisory circular must always be carried out on aircraft.

B. Advisory circular is the procedure that must be used when performing maintenance on an aircraft.

C. FAA provides advisory circular which is not always carried out on aircraft.

A. 在飞机座舱增压系统部分，应描述如何识别潜在问题和处理紧急情况。

B. 在飞机座舱增压系统部分，应说明识别可能问题和处理障碍的方法。

C. 在飞机座舱增压系统部分，说明识别问题和处理紧急情况的方法。

A. It is necessary to add fluid to the hydraulic reservoir.

B. Drain fluid to the hydraulic reservoir as necessary.

C. Add fluid to the hydraulic reservoir as necessary.

A. 辅助结构包括前缘、后缘、翼尖、翼尖油箱和燃油或水单元隔板，不包括镀层/蒙皮。

B. 辅助结构包括前缘、后缘、翼尖、翼尖油箱和燃料或水电池背板，不包括板/皮。

C. 辅助结构包括前缘、后缘、翼尖、尖端燃料箱和燃料或水电池背板，不包括板/蒙皮。

A. The cockpit voice recorder records signals from four audio inputs during the flight.

B. The cockpit voice indicator records four audio inputs in the flight.

C. There are four cockpit voice recorders recording in-flight audio input.

A. A Weight and Moment Limit diagram shall be used to describe the c.g. limits.

B. The maximum weight moment envelope diagram should be used to describe the c.g. limit of the aircraft.

C. A Weight and Moment Limit diagram shall be used to describe the maximum c.g. limit.

A. Move the sensor downstream and calculate the temperature again.

B. Move the probe downstream and monitor the temperature again.

C. Move the part downstream and measure the temperature again.

A. This section of the pilot＇s manual should clearly and confusedly provide recommended procedures for conducting normal operations.

B. The recommended procedures for conducting normal operations shall be described in this Section of the Pilot＇s Operating Handbook clearly and accurately.

C. The recommended procedures shall be stated in this Section of the Pilot＇s Operating Handbook clearly and fuzzily for the conduct of normal operations.