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Lesson 42 Recording an earthquake 记录地震 An earthquake comes like a thief in the night, without warning. It was necessary, therefore, to invent instrume 阅读全文
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Lesson 41 Training elephants 训练大象 Two main techniques have been used for training elephants, which we may respectively the tough and the gentle. The f 阅读全文
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Lesson 40 Waves 海浪 Waves are the children of the struggle between ocean and atmosphere, the ongoing signatures of infinity. Rays from the sun excite a 阅读全文
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Lesson 39 What every writer wants 作家之所需 I have known very few writers, but those I have known, and whom I respect, confess at once that they have litt 阅读全文
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Lesson 38 Water and the traveller 水和旅行者 Contamination of water supplies is usually due to poor sanitation close to water sources, sewage disposal into 阅读全文