二次曲线的直径

有声英文阅读-月球

The Moon 月球 We find that the moon is about 239,000 miles (384,551 km) away from the earth, and, to within a few thousand miles, its distance always remains the same. Yet a very little observation

发表于:2018-12-05 / 阅读(53) / 评论(0)

有声英文阅读

职业技术英语口语第24期:工具和设备在库房

In the storeroom 在库房 A:Where can I find a spare hose for the pump? A:我在哪里可以找到一跟备用的机泵软管？ B:What size do you need? B:你需要什么型号的？ A: 25 mm diameter. A:直径25毫米的。 B:They're at the back o

发表于:2019-01-14 / 阅读(56) / 评论(0)

职业技术英语口语

购物英语对话-Buying a Pan(1)

A: I am looking for a pan. B: No problem. What size would you like? A: A big one would be nice. B: How about this one? It's our biggest16 in diameter. A: Oh, yes. I like that one. But it's too heavy. B: Okay, try this one. It's made of aluminum. A: O

发表于:2019-01-20 / 阅读(91) / 评论(0)

购物英语对话

【购物】买平底锅-Buying a Pan

A: I am looking for a pan. B: No problem. What size would you like? A: A big one would be nice. B: How about this one? It's our biggest16 in diameter. A:I like that one, but it's too heavy. B: Okay, try this one. It's made of aluminum. A: This is muc

发表于:2019-01-21 / 阅读(53) / 评论(0)

购物-Shopping

VOA标准英语2008年-Iconic Former Samsung Chief Spared Prison Time

One of South Korea's most powerful business leaders has avoided a prison sentence for alleged corruption. A South Korean court agrees the former chairman of Samsung evaded taxes, but it threw out more serious charges. VOA's Kurt Achin reports from S

发表于:2019-02-02 / 阅读(28) / 评论(0)

VOA标准英语2008年（七月）

Tree climbing: Part 2

Tree climbing: Part 2 NB: This is not an accurate word-for-word transcript Dan: Hello and welcome to this weeks 6 Minute English. Im Dan Walker Smith and today, for the second part of our tree climbing programme（节目,计划）, Im joined by Kate.

发表于:2019-02-05 / 阅读(69) / 评论(0)

六分钟英语

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Actinobacterales

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antimony sodium tartrate