421、一般来说,在描述飞机或它的系统时,应该使用第三人称措辞

1067、WARNING. MAKE SURE THAT THE POTABLE WATER SYSTEN IS NOT PRESSURIZED.A PRESSURIZEDSYSTEM CAN CAUSE INJURY TO PERSONS.

1066、WARNING, if not correctly followed, could result in personal injury, or loss of life

1065、Vertical pages rather than horizontal are preferred for all types of publication

1064、Vertical lists make long complex sentences much easier to understand.

1063、 Verbs are given in the forms that are permitted. Do not use verb forms that are not listed.

1062 、 Utilizing an airplane as intended oy the manufacture, combined with, sound. inspection andmaintenance practice, forms the basis for assuring the airplane remains airworthy and safe to operate利用飞机的目的是制造，结合，声音。检查和维修实践是确保飞机适航和安全运行的基础

1061、Use the specified tool to seal the opening

1060、 use the manual procedure if it is not possible to use the automatic control

1059、Use the manual control in an emergency.

1058、 Unless the manufacturer＇s instructions tell you differently, do the procedure that follows. 除非制造商的说明书有不同的说明，否则按照下面的步骤操作。