每天一個生活口語話題，一段地道的舉例回答，并附有詳細的詞匯，發音及用法講解。講解材料選自當今最先進最有效的英語原版教材，更加貼近生活。每天堅持聽講解，并根據問題練習，給自己一個地道輸入和輸出的機會，你也可以張口自信說英語。

主題：What was the best invention of the last 50 years?

I have to say 3D-printing. The process known as additive manufacturing is still in its early stages, but the impact will be enormous. Gone will be assembly lines, long waits for products, and massive storage facilities. We can produce things locally that used to be kept in warehouses. Tools and equipment can be created without needing materials from several suppliers, as can life-changing medical parts such as artificial limbs.

Additive manufacturing: 添加制造
Assembly lines: 裝配線
Artificial limbs: 假肢