单词：magnetic plane characteristic
单词：magnetic plane characteristic 相关文章
Twice a year, day and night, fall into balance, lasting for nearly equal length. Known as equinoxes, Latin for equal night, they occur in March and September and along with solstices mark the changing of seasons as Earth travels around the sun. Astro
自然百科2008年
Twice a year, day and night, fall into balance, lasting for nearly equal length. Known as equinoxes, Latin for equal night, they occur in March and September and along with solstices mark the changing of seasons as Earth travels around the sun. Astr
国家地理2008年
WASHINGTON, July 19 (Xinhua) -- The number of Americans initially applying for unemployment aid last week rose sharply after hitting a record low since mid-May in the previous week, the U.S. Labor Department reported Thursday. The figure for seasonal
英语新闻
By Challiss McDonough Cairo 11 October 2007 The Muslim holy month of Ramadan is drawing to a close. For many Egyptians, the month of fasting also brings cherished traditions, including special dishes and social gatherings that last long into the nigh
2007年VOA常速英语（十月）
How To Prevent Seasonal Mood Disorder When the winter season arrives, the days begin to get shorter and shorter. During seasonal shifts, it is not uncommon for people to experience alterations in their moods. Commonly, negative feelings and attitudes
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NOEL KING, HOST: Today is the winter solstice. It's the shortest day of the year, and this is also a time of year when a lot of people feel down or depressed. Now scientists think they have new information on why short days lead to such dark moods. N
2018年NPR美国国家公共电台12月