One story says it was first used during the early days of the telephone to tell an operator that a message had been received.

VOA: special.2010.02.28

The syntax is OK in the sense of, it is an operand, an operator, an operand, so syntactically it's OK.

这里的语法应该是好的，有个运算对象，一个运算符，另外一个运算对象，因此语法上是没错的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Well, the assignment operator makes a copy of the thing on the right and puts it in the thing on the left.

赋值操作符把右边的东西,复制到左边。

哈佛公开课 - 计算机科学课程节选

"Because this is a very aggressively-priced LTE phone, Huawei have a good chance of getting it into operator portfolios for 2013, " said Mr Wood.

BBC: Samsung and Huawei kick off Mobile World Congress

"It's the dominant fixed-line operator because it had a monopoly until recently, " he says.

CNN: Cell-Phones On the Line

Sotheby's sold it to the Australian operator Alan Bond, who bought it on time, later went bankrupt and then served some time.

FORBES: The "Orange Marilyn" and the market