However,the Canadian government required that each person had to bring enough supplies to last for one year if they wanted to cross the border into Canada.

VOA: special.2009.02.11

When you would take the fluid from the cow, and you would inject it underneath the skin of a person you wanted to protect, then at that site where you injected it, you would get a lesion that looked like a smallpox or cowpox lesion.

当你从奶牛上得到脓液,并把脓液注射到想受到保护的,人的皮肤下面,然后在你注射的地方,你会看到像天花或者牛痘一样的病变

耶鲁公开课 - 生物医学工程探索课程节选

Rosa Parks and three other black people were seated in the middle area of the bus when a white person got on the bus and wanted a seat.

VOA: special.2009.03.08

He wanted to be the first person to fly around the world.

VOA: special.2009.03.18

The official,who spoke on condition of anonymity, indicated Admiral Mullen had an idea what the request would be, but wanted to receive the official document in person and hear details directly from General McChrystal.

VOA: standard.2009.09.25