确保能够通过观测计看见滑油油位。

A. Procedures for handling malfunctions or other abnormalities that are not emergent, or potentially emergent may be delayed in this section.

B. This Section may cover procedures for handling malfunctions or other deviations that are not of emergency nature, or involve a potential emergency that may be handled later.

C. This Section may cover procedures for handling malfunctions or other deviations that are not emergent, or involve a potential emergency that may be deterred.

A. This section includes all the limits of the optional systems and equipment.

B. Limitations related to optional systems may be contained in this section.

C. Only the limitations which are relevant to optional systems might be including in this section.

A. Wait for the paint to dry completely before polishing it again.

B. Do not apply the second layer of paint if the first layer has dried thoroughly.

C. Let the first layer of paint dry fully before you apply the second layer.

A. Do not taxi where there is dirt.

B. Do not tow in areas where there is slush.

C. Do not land in locations where there is slush.

A. An inoperative pump will be identified by a decontaminated filter.

B. Contaminated filter elements indicate a defective pump.

C. If filter elements are clean , the filter elements are inoperative.

A. 手册应随时修订。它们可以是活页形式，带有可接受的临时或永久性装订。

B. 手册应易于修订。它们可以是活页形式，带有耐用的线圈夹或永久性装订。

C. 手册应能够修订。它们可以是活页形式，带有通常的多环式封面或永久性装订。

A. 复合板材使搭接处更坚固。

B. 加强板使搭接接头更坚固。

C. 经过再次强化的板材使搭接凸缘承力更强。

A. Install caps on the receptacles to make sure that unwanted material does not go into the receptacles.

B. To ensure foreign objects do not get into the connectors, you should install caps.

C. To keep the unwanted material away from the receptacles, install plugs on them.

A. 作动时间必须在28至40秒之间，在某个方向作动电流不得超过0.5安培。

B. 指令要求作动时间必须在28至40秒之间，且作动电流不得少于0.5安培。

C. 在任何一个方向上作动的时间必须在28至40秒之间，且作动电流不得超过0.5安培。

A. This tool is mandatory.

B. This tool is optional.

C. This tool is necessary.