1, symbol: symbol; Symbol; Mark; Gestures; Signboard; Sign; Signature; Sign; signal

2. signal: signal; Codeword; Fuse; Signs; Signal; Express delivery; Remarkable; As a signal; sing

Second, the parts of speech are different.

1, sign: You can be a noun or a verb in a sentence.

2. Signal: You can be a noun, a verb or an adjective in a sentence.

Third, the use is different.

1, symbol: usually used as mathematical symbol, physical symbol, etc.

2. Signal: It is a way to convey information to the process. You can think of the signal as the manager of the building stuffing a small note into the mailbox of the room.

Detailed explanation of signal vocabulary:

English words, nouns, transitive verbs, intransitive verbs and adjectives all have the meaning of "signal" when used as nouns; Codeword; Fuse, name; Signahl (Sweden) "means" sign "when used as a transitive verb; Signal; When used as an intransitive verb, it means "signaling" and when used as an adjective, it means "remarkable"; As a signal. "

First, phrase collocation:

Digital signal: digital signal from communication; Digital signal?

Analog signal: analog signal; analog quantity

Distress signal: distress signal; signal for help

Railway signal: Railway signal? ; Railway signal; Railway signal

Second, the example:

What about you? Must? Signal? Which one? Way? What about you? Is it? Going? Where to? Turn around. ?

In which direction do you want to turn, you must signal.