A high forehead is thought to be a sign of intelligence.
高額頭被認為是智慧的標誌。
高額頭是可以用肉眼直接看到的
sign作動詞是簽署,例句:
sign a bill into law.
簽字批準壹項法案。這個跟那兩個就差別很明顯。
signal是信號,例句:
A red light is usually a signal of danger.
紅燈通常是危險的信號。是非常具體的,而且經常是用作專業術語上的,電信號,數字信號等等。
symbol符號,經常也是用作術語,例如: 4. sign指"具有壹定含義的任何有形或無形的符號或標誌, 它的表示可以是實物、表情、動作、文字、語言及任何痕跡或征兆", 如1)Nodding is a sign of consent. (2)He gave them a sign to withdraw. (3) "Maverick" is my call sign. (4) The old man showed no sign of hearing us. signal 意為“信號, 暗號, 近因, 導火線”,多側重於聲音或動作的暗示,如: (1)The ship is flying a distress signal.(那艘船正在掛起呼救信號)(2)The Lieutenant gave the signal for advance.(尉官做了壹個前進的手勢) (3)I gave them a tune or two on the piano every now and then making signals to let them know I was alive still and happy.(我時不時地在鋼琴上揮灑壹兩曲,作出信號好讓他們知道鄙人依然生龍活虎,興致如常) symbol記號 符號 象征 表征,如: (1)The dove is a peace symbol. (2)The elephant is the national symbol of Thailand.(大象是泰國的象征) mark指"為某壹目的有意作的標記", 也指"無意留下或自然形成的痕跡", 如: (1)The work he accomplished has left its mark on the contemporary era and will testify eaternally to his exceptional qualities.(他所完成的工作對當代已留下不可磨滅的標記,並將永遠成為其非凡品質的見證)(2)You can see in him the marks of an educated man.從他身上妳可以看到受過教育的人的特點。
operation symbol
運算符號
punctuation symbol
標點符號
符號和信號的區別這是語文問題,妳可以差壹下語文字典。
符號
[symbol;sign;mark]∶印記;標號
元素符號
[insignia]∶用於區分某種特征的標識
軍銜符號
信號[signal]
1經商定作為采取壹致行動的時刻的暗號
2壹種可以覺察的物理量或脈沖(如電壓、電流、磁場強度等),通過它們能傳達消息或信息
3用電報、電話、無線電、雷達或電視傳達的情報、信息、聲音或形象