VOA慢速英语:Researchers: New Material Can Protect older adults

1. Armourgel is a combination of two new man-made materials.

a combination of …的组合;
例句：Good consulting is a combination of detective work, counseling, and in-depth industry knowledge. "
好的顾问结合了侦探工作、咨询服务和深入的行业知识。”

2. When you impact it in this direction it actually folds in on itself.

fold in 包起来; 笼罩，环绕;
例句："You can also pattern the lines on either side of the material," dickey says, "which causes the hinges to fold indifferent directions. This allows you to create more complex structures."
“你也可以在塑料板的任一表面画出线条，”迪克说，“那样折痕沿着不同方向进行折叠，你就能创造出更多复杂的结构。”。

3. no matter how good, are not the best solution.

no matter  不介意;  不要紧; 不管;  不论;
例句：RNo matter where you start.
不管你的起点在哪里。