"We'll need to wait for all the girls to enter puberty before we have a good grasp on what the contribution is of those environmental chemicals."

VOA: special.2010.08.18

So, it's awkward to have to wait for a cow to get infected before you can vaccinate a population.

在给人们预防接种之前,你只有干等着,直到有一头奶牛感染了病毒才行

耶鲁公开课 - 生物医学工程探索课程节选

PATA spokesman John Koldowski, says the travel industry may have to wait until 2011 for a full recovery.

VOA: standard.2010.02.04

We just have to wait and see for that,". A similar effort to develop a vaccine has been launched in the United States.

VOA: standard.2009.04.30

But we're not going to wait forever,". Kelly said preparations have been made for a visit Sunday by IAEA inspectors to the partially-underground enrichment facility near the city of Qom that Iran recently acknowledged it has been secretly building.

VOA: standard.2009.10.24

He says finding that out will be crucial. "Whether this was an act of terrorism conducted by al-Qaida central or that of a lone wolf acting independently, we will have to wait and see for the investigation and what comes out of that, but we do know that al-Qaida and their affiliates have a crazed obsession in targeting the aviation industry,"

VOA: standard.2009.12.27