notation

名词 notation:

1. a technical system of symbols used to represent special things
   同义词：notational system
2. a comment or instruction (usually added)
   同义词：note, annotation
3. the activity of representing something by a special system of marks or characters

1. The authors wish you to read it with a pencil in your hand, for you will often be asked to make certain notations, to write answers to particular questions.
   作者们希望你在读这本书的时候手里要拿上一支铅笔，因为我们要求你经常做点笔记，或是将一些具体问题的答案写下来。
2. A notation, usually a question mark, calling attention to an item in order to question its validity or accuracy.
   疑问号一个记号，通常为问号，以引起对某一事物的注意以便就其有效性或准确性提出质疑

no.ta.tion

n.（名词）

A system of figures or symbols used in a specialized field to represent numbers, quantities, tones, or values:
标志：图案或符号系统，用在特殊领域表示数字、数量、语气或价值：
例句：
musical notation.
音乐符号

The act or process of using such a system.
注解：使用这套符号的行为或过程
A brief note; an annotation:
记号；符号：
例句：
marginal notations.
边页的注解

来源：
Latin not3tiô not3tiôn-
拉丁语 not3tiô not3tiôn-
from not3tus [past participle of] not3re [to note]
源自 not3tus [] not3re的过去分词 [注解]
from nota [note] * see note
源自 nota [注解] *参见 note

【引伸】
nota.tional
adj.（形容词）