It may be the most important speech so far in Mr.Obama's young presidency.

VOA: standard.2009.09.04

"And so it's possible that the effects that we have reported may be a conservative estimate, and that the odds of survival associated with high-quality relationships may actually be larger."

VOA: standard.2010.07.29

Their mobile phones could save them a trip. So,while it may not be good for plowing a field or harvesting vegetables, the mobile phone is becoming one of a farmer's most valuable tools.

VOA: standard.2010.07.28

They do not like uncertainty, so that may be resolved with this agreement, but they also do not like it if there are too many mouths to feed, too many demands on the table."

VOA: standard.2010.05.13