记忆方法
1、sign- + -al.
2、动态的符号，就是信号、暗号。
2、动态的符号，就是信号、暗号。
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词族 · signal
中文词源
signal 信号，暗号，标记，表明
sign,标记，记号，-al,名词后缀。引申词义信号，暗号等。
英语词源
- signal
-
signal: [16] Latin signālis meant ‘of a sign’ (it was derived from signum ‘mark, token’, source of English sign). It came to be used as a noun, and passed via medieval Latin signāle into Old French as seignal. This was later relatinized into signal, in which form it was taken over by English. The adjective signal ‘conspicuous’ came from the same ultimate source, but via a more circuitous route. The Italian version of the noun signal is segnale. From it was derived the verb segnalare ‘make famous’, whose past participle segnalato gave French signalé – whence English signal.
=> sign - signal (n.)
- late 14c., "visible sign, indication," from Old French signal, seignal "seal, imprint, sign, mark," from Medieval Latin signale "a signal," from Late Latin signalis (adj.) "used as a signal, pertaining to a sign," from Latin signum "signal, sign" (see sign (n.)). Restricted sense "agreed-upon sign (to commence or desist, etc.) is from 1590s. Meaning "modulation of an electric current" is from 1855.
- signal (v.)
- 1805, "to make signals to," from signal (n.). Related: Signaled; signaling. Earlier verb was signalize (1650s).
- signal (adj.)
- "remarkable, striking, notable" ("serving as a sign"), 1640s, from French signalé, past participle of signaler "to distinguish, signal" (see signal (n.)).
权威例句
- 1. The coded signal is received by satellite dish aerials.
- 编码信号由碟形卫星天线接收。
- 2. As soon as it was dark, Mrs Evans gave the signal.
- 天一黑，埃文斯夫人就发出了信号。
- 3. The transmitters will send a signal automatically to a local base station.
- 发射台会自动将信号发射到地方基站。
- 4. A thin cable carries the signal to a computer.
- 一根细电缆将信号传送给一台计算机。
- 5. Kurdish leaders saw the visit as an important signal of support.
- 库尔德领导人将这次访问视作一种表示支持的重要信号。
词语辨析
【sign, emblem, symbol, token, attribute, mark, signal, badge】
这组词都有“标志、象征、符号”的意思，其区别是：
sign: 普通用词，指人们公认事物的记号，也可指某种情况的征兆。
emblem: 指选定象征一个国家、民族或家庭等的图案或实物。
symbol: 指作象征或表达某种深邃意蕴的特殊事物。
token: 语气庄重，指礼品、纪念物等作为表示友谊、爱情等的象征或标志。
attribute: 指人或物及其地位、属性的象征。
mark: 普通用词，含义广泛。既可指方便于辨认而有意做的标记，又可指自然形成的标记或有别于他事物的特征。
signal: 指为某一目的而有意发出的信号。
badge: 一般指金属证章或写有姓名的带状标志物。
这组词都有“标志、象征、符号”的意思，其区别是：
sign: 普通用词，指人们公认事物的记号，也可指某种情况的征兆。
emblem: 指选定象征一个国家、民族或家庭等的图案或实物。
symbol: 指作象征或表达某种深邃意蕴的特殊事物。
token: 语气庄重，指礼品、纪念物等作为表示友谊、爱情等的象征或标志。
attribute: 指人或物及其地位、属性的象征。
mark: 普通用词，含义广泛。既可指方便于辨认而有意做的标记，又可指自然形成的标记或有别于他事物的特征。
signal: 指为某一目的而有意发出的信号。
badge: 一般指金属证章或写有姓名的带状标志物。