Polymer waterproof material

polymer ['pɑlɪmɚ]

n. 多聚物;[高分子] 聚合物;

poly多+mer=merit积德→ 聚合体

waterproof ['wɔtɚpruf]

adj. 不透水的，防水的;用防水材料处理过的; vt. 使防水，使不透水;给（布）上胶; n. 防水衣物，雨衣 usually plural;防水布，油布;防水物，防水材料;

water水+proof防...的 →防水的

material [mə'tɪrɪəl]

n. 材料，原料;素材;布，织物;适当人选; adj. 物质的;肉体的;重要的，决定性的;辩证的，推论的;

I was expecting him here at five forty-five.

我们约好了五点四十五在这里会面的。

I think he's still in bed.

我想，他还赖在床上。

Lawn mowers whining on a summer's day, late-night parties in apartment blocks, noisy neighbors, vehicles of al kinds, especially large container trucks thundering through quiet village, planes and helicopters flying overhead, large radios carried round in

夏天呜呜作响的割草机，公寓楼里深夜聚会的喧哗声，大声吵闹的邻居，各式各样的车辆，特别是穿越寂静的村庄的集装箱卡车，从头顶飞过的飞机和直升机，被带到公共场所、音量开到最大的大功率收音机。