Polyepoxide
聚环氧化物
🗣️ 情景例句
and if he talks as loudly as he cries,
如果他说话像他哭一样大声，
I hope that I can make a worthwhile contribution to the efforts of this group.
我希望能对这个团体努力的成果提供有价值的贡献。
Since the sea covers the greater part of the earth's surface,
既然海洋覆盖着地球的大部分表面，