[林 测] 森林计测学

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发表于:2018-12-05 / 阅读(202) / 评论(0) 分类 商业服务英语

69 非洲象与亚洲象之间的差别 SCIENCE REPORT - September 19, 2001: African ElephantsBy Nancy Steinbach (Start at 1'02

发表于:2018-12-09 / 阅读(92) / 评论(0) 分类 自然探索

This is Scientific American's 60-Second Science. I'm John Matson. Got a minute? In a laboratory vault outside Paris is a small cylinder of platinumiridium alloy that serves as the standard for all mass measurements worldwide. By an 1889 international

发表于:2018-12-24 / 阅读(42) / 评论(0) 分类 Scientific American(一)月

Lesson 24 [00:06.37]第二十四课 [00:12.75]1.Just practise [00:14.18]1.练习 [00:15.62]Our lessons are very interesting. How do you like science field trips? [00:20.17]我们的功课非常有趣. 你喜欢科学田野考察吗? [00:24.71]I like

发表于:2019-01-09 / 阅读(115) / 评论(0) 分类 人教版小学英语五年级

SCIENCE IN THE NEWS - Mangrove Forests Among the Most Carbon-rich Forests in the World BOB DOUGHTY: This is SCIENCE IN THE NEWS, in VOA Special English. Im Bob Doughty. FAITH LAPIDUS: And Im Faith Lapidus. This week, we will tell how coastal forests

发表于:2019-01-12 / 阅读(49) / 评论(0) 分类 2011年VOA慢速英语(五)月

BARBARA KLEIN: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. BOB DOUGHTY: And I'm Bob Doughty. Today, we will tell how technology could help doctors meet demand for transplant organs. We also will tell about a scientific effo

发表于:2019-01-12 / 阅读(80) / 评论(0) 分类 2010年VOA慢速英语(十)月
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alveolar-efficiency
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Hlelanzeik
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