单词：effective population size
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Lesson 9 Is It a Good Idea to Control Population Growth in the World? Text What Overpopulation Feels Like We moved slowly through the city in a taxi and entered a crowded slum district. The temperatur
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1. drug company=pharmaceutical company 医药公司n. 2. promotion=marketing 营销n. 3. increase=escalate=rise=go up=grow 上升v. 4. research=study=survey=investigation 研究n. 5. work=be an effective way=be useful=help=achieve=succeed=have an eff
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[00:01.84]3 Listen and complete. [00:06.70]What have the children done for their project [00:10.30]on population? [00:11.96]Listen and complete their sentences. [00:16.14] [01:04.64]4 Listen and complete. [01:08.78]Listen and fill in the missing info
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The worlds population is getting bigger and bigger. Theres a population explosion in some countries. Im not sure if this is good or bad. The Earth can only support a limited number of people. One day, the worlds population will be too big to feed eve
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By Robert Raffaele Washington 10 July 2007 This week marks the United Nations' annual observance of World Population Day (Wednesday July 11th) -- focusing attention on issues surrounding population growth worldwide. The annual event comes on the heel
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