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60秒科学:利用录音发现青蛙的数量可能被高估了

Frog census volunteers misinterpreted recorded frog sounds in the field, leading researchers to suspect that frog populations may be even lower than thought. Declining frog populations are considered an indicator of environmental damage. But new rese

发表于:2019-01-02 / 阅读(91) / 评论(0)

60秒科学

SSS 2010-08-05

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute Declining frog populations are considered an indicator of environmental damage. But new research finds that frogs might be doing even worse than we thou

发表于:2019-01-08 / 阅读(43) / 评论(0)

Scientific American(八)月

流行美语 (Popular American) 328

Larry和李华一起坐地铁回家。今天我们要学两个常用语：get the ball rolling和mull it over. LH: Larry, 这两天天气真好，我看，过不了多久树就要发芽了。我真巴不得春天马上就到。 LL: Me too. I can't wa

发表于:2019-01-15 / 阅读(37) / 评论(0)

美国之音《流行美语》

英语语法：34 Appositives

Grammar Girl here. Todays topic is appositives. Guest-writer Bonnie Trenga writes, Today we have to decide if information is essential or extra, because if its extra well need some extra commas. The concept Im referring to is called an appositive. A

发表于:2019-01-30 / 阅读(125) / 评论(0)

英语语法 Grammar Girl

Inter win, Klose salvages Lazio

ROME, Dec. 10 (Xinhua) -- Inter Milan chalked up a crucial 2-0 win over Fiorentina at home on Saturday to lift themselves from Serie A's relegation zone. Former Fiorentina striker Giampaolo Pazzini scored the opener four minutes before the break, wit

发表于:2019-02-05 / 阅读(62) / 评论(0)

英语新闻

Inter beat Lille 2-1

ROME, Nov. 2 (Xinhua) -- Inter chalked up their first home win in the Champions League this season as they beat Lille 2-1 on Wednesday. Walter Samuel and Diego Milito scored the goals for the hosts, and Lille drew one back in the late time. Inter alm

发表于:2019-02-18 / 阅读(72) / 评论(0)

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学英语单词

abu-rabia

afterwaters

anterior laryngeal nerve

black-crowned night-heron

block started by symbol