Still,Burton is cautious about how it will all play out, given the enormity of the task.

VOA: standard.2009.06.15

I think it's a matter of, as a cyclist, being cautious, but also not being afraid.

我想作为一个骑自行车的人，这是自己小心的问题，但是也不必害怕。

我使用自行车 - SpeakingMax英语口语达人

"Cautious optimism is once again the buzz word and I think the region Asia Pacific is showing the way in terms of the IATA statistics,".

VOA: standard.2010.02.04

The visit to Damascus by U.S.envoy Mitchell is another step in what has been a cautious effort by the Obama administration to draw Syria into diplomatic engagement after years of strained relations.

VOA: standard.2009.06.09