分类词汇：常见花卉

American history: Columbus discovers the New World

American's first exchange students from China

Men face higher death risk, but why?

Mideast protests spark debate over free speech, religion(视频)

IB program aims to form 'students of the world'(视频)

US firms prospering in Asia, Russia(视频)

Tree deaths linked to climate change

Despite recession, blow-dry bars heat up

The legal battle between Apple and SamsungDownloa

Teens help revive California nature

Turning industrial waste-heat into electricity

National 9/11 museum at standstill as anniversary nears

2012 Americana Music Award nominees announced

New heart stents better than old ones, study says

Sea life color codes food to evade danger

US beefs up security after embassy attacks(视频)

Chinese invest in Italian soccer club(视频)

US automakers bet billions on Russian car boom

A UN warning about chemical dangers

'War of 1812' flag still inspires after 200 years

US drought renews debate on biofuel

Apollo 13: 'Houston, we've had a problem here'

Man who found California gold died broke

Health Experts: One last push needed to eliminate polio

Designing an alternative to antibiotics

Worries about rising food prices may ease

Marylanders recall bloodiest day in US history

The Occupy Movement turns one

Tensions rising again over Iran's nuclear program(视频)

English settlers establish colonies In the New World