单词:cold preservation
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UNIT 69 POPULAR SCIENCE (Ⅱ) Lesson 137 Part Ⅰ Warming-up Exercises Instruction-following: Square or Circle? 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Score: _______ Part Ⅱ Preserving The Environment Vocabu
There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th
Have You Ever 'Scraped the Bottom of the Barrel?' Now, Words and Their Stories, a program from VOA Learning English. Today we talk about a problem we have all faced. It is when you have to make a decision, but the choices you have are not very appeal
ARI SHAPIRO, HOST: And now a true crime story that involves a theft, an anonymous tip and a very special tuba. (SOUNDBITE OF TUBA MUSIC) SHAPIRO: That is the missing tuba - a sousaphone, to be exact. Here's its owner to tell us about his instrument,