The WHO's Phase 5 threat warning signals that a global pandemic could be imminent, but has yet to develop, with human-to-human transmission occurring in many geographical locations.

VOA: standard.2009.04.30

What should we say about Phase A, when the body is turned on and functioning,developing, but the brain has not yet gotten to the stage at which it's turned on, or perhaps it hasn't yet become, well,it's not doing person functioning.

我们对A阶段又该做何解释呢，当身体开始运行发展，但大脑还未到达开发的阶段，或者说这阶段尚未到来时，并没有人格功能的产生。

耶鲁公开课 - 死亡课程节选

But the virus has yet to show itself to be more severe than seasonal flu.

VOA: special.2009.08.18

"But we don't know what to do because the government has not issued land title on our place yet."

VOA: standard.2010.06.02

Russian Railways president, Vladimir Yakunin, says that the cause of the derailment has yet to be determined, but sabotage has not been ruled out.

VOA: standard.2009.11.27

Mr.Singh,in recent days, has said his government is not yet ready to quantify reduction targets but he has left the door open to that.

VOA: standard.2009.11.08

But Mr.Obama is hamstrung by the fact the US Congress has yet to pass climate legislation.

VOA: standard.2009.11.26

The NATO investigation has yet to be concluded, but a leading Afghan rights group says its findings reveal that most of those killed were civilians.

VOA: standard.2009.09.07

But the military has yet to launch a ground offensive there because it says it is consolidating gains in the Swat Valley before expanding the anti-insurgency activity.

VOA: standard.2009.09.14

The military says 57 people died. Captain Camara has not yet announced his candidacy, but he has told several regional diplomats that he intends to run for president.

VOA: standard.2009.12.07

"But what has not yet happened is setting up the complicated vehicles inside the institution to convert that gold and the proceeds from selling it into money for low income countries.

VOA: standard.2009.04.20