让我们把它想象成建筑师和木匠之间的关系。
Let's think of it as the relationship between architect and carpenter.
工程师们尝试用蒸汽，酸和酶把纤维素分解成有用的糖。
Engineers have tried using steam, acids and enzymes to break cellulose into useful sugars.
2007年，七吨重的钢铁从740英尺高的大楼上坠落，把地面上一位建筑师砸成瘫痪。
In 2007, seven tons of steel fell off the 740-foot-tall building, paralyzing an architect on the ground.
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