But the public was warned to be careful of false appeals.

VOA: special.2010.01.16

But there's one other complication that you've got to be warned about, which is this. Because these are dialogues and they take the form of philosophical arguments, people put forward views and then, over the course of the discussion, change their minds about things.

但是,还有一个地方,我要提醒你们,那就是,由于这些是对话作品,且它们全都采用了哲学论证的形式,即,人们先提出观点,然后,在讨论的过程中,改变自己的关于事物想法

耶鲁公开课 - 死亡课程节选

He proposed tripling humanitarian aid to Pakistan, but warned military assistance would be cut if Islamabad did not do enough to fight terrorists.

VOA: standard.2009.03.26

But he warned 2010 would be "a more complicated and complex year", domestically and internationally.

VOA: standard.2010.02.14

Only hours after Mr.Karzai's victory in the tainted election, President Obama welcomed the Afghan leader's pledge to eradicate corruption, but frankly warned the proof of those efforts will be not in words,but in deeds.

VOA: standard.2009.11.17