As with the UNION operator, the join operator itself remains synchronous and is only able to process input from one leg of the join at a time.

和UNION操作符一样，连接操作符本身是同步的，每次只能处理来自连接操作符某一个分支的输入。

youdao

Since the bubble burst, Softbank has reinvented itself at least twice, first as a fixed-line telecoms and broadband firm, and now that scheme has lost its shine, as a mobile-phone operator.

在互联网泡沫破灭之后，软银经历了两次转型，第一次是转型为一家固定电话和宽带服务商，而现在这一行业风光不再，软银又转型成了一家移动电话运营商。

youdao

Cox Communications Inc. will have the tough job of trying to differentiate itself from competitors as the cable operator prepares to start a wireless service this year in an already crowded U.S. market.

WSJ: Cox Plans to Launch a Cellular Network