このフレーズまたは「SHALL NOT」というフレーズは、その定義が本仕様で絶対的に禁止されていることを意味します。 言葉通り、MUST NOTまたはSHALL NOTのラベルが付けられた項目は絶対的に禁止されている。 SHOULD、RECOMMENDED. SHOULD This word, or the adjective "RECOMMENDED Theheight of the vertical section must not be greater than 4 feet (1219 mm). If the height is greater than 4 feet (1219 mm), then the fixture requires venting by a method other than the single stack method. In most situations, fixtures will not be greater than 4 feet (1219 mm) above the horizontal branch so additional venting methods are Studywith Quizlet and memorize flashcards containing terms like The Tier 3 Investigation is designated for the following positions:, Which of the following methods may be used to transmit Top Secret material?, Which of the following is responsible for the review of written materials for public release? and more. 1Source: Eloquent JavaScript: A Modern Introduction to Programming, 2nd Edition by Marijn Haverbeke Example: Variable names can be any word that isn't reserved as a keyword (such as var ). They may not include spaces. Digits can also be part of variable names— catch22 is a valid name, for example—but the name must not start with a digit. InvalidOperationException Could not create an instance of type 'AdoteRJ.Models.Adotante'. Model bound complex types must not be abstract or value types and must have a parameterless constructor. Alternatively, give the 'model' parameter a non-null default value. ใช้ในกรณีที่เป็นความต้องการของเราเอง 1. ใช้ในกรณีที่เป็นสิ่งจำเป็นต้องทำ อาจเป็นกฎหรือข้อบังคับ. 2. โครงสร้าง must + verb infinitive (V.1) 2 .

must be not or must not be