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重點講解：
1.During this presentation 在這期間;在這里
例句：During this presentation, I realized the wisdom of the ancients, papermaking is one of the crystallization of their labor;
在這段介紹中，我體會到了古人的智慧，造紙術也是他們的勞動結晶之一
2.impact on 影響；對…沖擊
例句：He said the right stimulus plan would "not be window-dressing" and would have a "measureable" impact on growth.
他表示，適當的激勵計劃“不是一種形式”，將對經濟增長產生“重大”影響。
3.a boom in 暴漲...
例句：Russia has become rich over the last few years due to a boom in commodity and energy prices.
由于商品和能源價格暴漲，俄羅斯在過去的數年里已經變得富有。
4.at the forefront 最前沿
例句：They may look like an ordinary pair of spectacles, but these glasses are at the forefront of a revolution in eyewear.
它們看起來像普通的眼鏡，但是是眼鏡改革的最前沿。
