准条约
(quasi-treaty 的复数)

数学英语 23 What are the Range and Standard Deviation?

by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?

发表于:2018-12-07 / 阅读(99) / 评论(0)

数学英语

【美国精神】第41期

Explanation: When the 13 original states united (or came together) to make a new country, each of the states wanted to keep its powers and independence (or ability to make its own decisions). But the new federal (or national) government would also ne

发表于:2018-12-28 / 阅读(67) / 评论(0)

美国精神

Destruction of the Indonesian Forests

Broadcast: Jan 24, 2003 By George Grow This is the VOA Special English ENVIRONMENT REPORT. Two environmental groups blame dishonesty1 among Indonesian officials for the continued destruction of the co

发表于:2019-01-02 / 阅读(63) / 评论(0)

VOA2003（上）-社会广角

SSS 2011-10-05

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.

发表于:2019-01-08 / 阅读(117) / 评论(0)

Scientific American(十)月

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