The mutex object must be declared; once declared, it must be initialized.

互斥量对象必须先被声明；声明后还必须初始化。

youdao

The tuberculosis epidemic, once declared a public health emergency, has been turned around.

结核病的流行曾一度被宣布为突发公共卫生事件，而现在趋势已经扭转。

youdao

Bennett once declared that "speculators should not have the advantage of earlier news than the public at large."

班尼特一度宣称“投机商一般不得比公众优先获取信息。”

youdao

"Himmler once declared that the Nazis had to kill all the Jews because, if not - quote - their grandchildren will ask for their property back.

VOA: standard.2010.07.26

The rub was this: "I've never been interested in the money we make but in the influence we have, " Pulliam once declared.

FORBES: Not in the family

That's what will lend meaning to the creed our fathers once declared.

BBC: Obama inauguration: Full text

Giuliani (who once declared Yankee Stadium the most romantic spot in New York) had been seeing Nathan regularly, and publicly, for several months.

NEWYORKER: Mayberry Man