归一化回波强度

VOA标准英语2010年-Vitamin D May Protect Against Heart At

Vitamin D is an essential nutrient that we get through exposure to sunlight and through diet. Without enough Vitamin D, we are at risk for rickets, osteoporosis and bone fractures. Now, researchers have found that Vitamin D deficiency is also associa

发表于:2019-01-11 / 阅读(46) / 评论(0)

VOA标准英语2010年(三月)

voa标准英语2008-Indian PM Wants 'Normalized' Relations with Paki

India's Prime Minister Manmohan Singh says he wants normalized relations with Pakistan, but that Islamabad must stop allowing its territory to be used for terrorist activities against India. Mr. Singh made the statement during an election rally in I

发表于:2019-01-11 / 阅读(61) / 评论(0)

VOA标准英语2008年(十二月)

THIS IS AMERICA - Glen Echo Park

THIS IS AMERICA - Glen Echo Park By Jerilyn Watson Broadcast: Monday, June 14, 2004 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Faith Lapi

发表于:2019-01-30 / 阅读(141) / 评论(0)

This is America

人生的回音The Echo

A son and his father were walking on the mountains. Suddenly, the son falls, hurts himself and screams, AAAhhhh!!!To his surprise, he hears the voice repeating, somewhere in the mountain, AAAhhhh!!! Curious, he yells, Who are you? He receives the ans

发表于:2019-02-03 / 阅读(63) / 评论(0)

英语美文

科学美国人60秒 SSS 人类回声器原理类似蝙蝠回声

Human Echolocators Use Tricks Similar to Bats Many bats use a system similar to sonar to navigate in the dark. They send out high frequency sound, sometimes as clicks, and get information about their surroundings by the timing and quality of the soun

发表于:2019-02-14 / 阅读(37) / 评论(0)

2018年科学美国人3月

音乐咖啡厅:Christina Grimmie - Echo

Boy I don't understand your drama Thought we were having fun should I not have called you Should I be sorry for being me I'm just trying piece together your mind You and me were cool when I saw you last night Now we're in this state of emergency Oh y

发表于:2019-02-25 / 阅读(115) / 评论(0)

音乐咖啡厅

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学英语单词

...tell me about it

a hive of activity

a-phenoxypropylpenicillin potassium

additive algorithm

algebraically oriented language (algol)