There is a way to get rid of~ the red color: . When a bright light is shone on the mechanophore, the broken bond is fixedrn and the red color disappears. This self-healing may be a problem for engineers. They need to use the color-changer in big construction projects that will be , in sunlight. And sunlight will make the mechanophores warning system useless.
Sottos and her fellow scientists still have work to do before the color-changing molecules can. be used outside the lab.
词汇:
crossing n.十字路口 mechanophore n.机械响应性聚合物 intersection n.交叉路口
molecule n.分子 snap v.折断,断裂 polymer n.聚合物 atom n.原子
注释:
1. Thanks to:多亏,由于
2. bridge supports:桥梁支柱
3. seconds before it snaps:聚合物断裂前几秒钟。Seconds 修饰状语从句 before it snaps。It 指代 polymer。
4. damage to materials or structures:材料或建筑物的损坏。to 是介词。介词短语 to materials or structures 修饰 damage。
5. is about to break:即将断裂。be about to 意为刚刚,行将。
6. get rid of:除去。
7. the broken bond is fixed:断裂的键被修复。Fix 意为修理,修复。
练习:
1 A measures B accidents C actions D collapses
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