Polyurethane brightener
[化] 聚氨酯光亮剂
🧩 词语组成解析
n. 聚氨酯\\n[化] 聚氨基甲酸酯; 聚氨酯
增白剂, 抛光剂, 光亮剂
🗣️ 情景例句
A couple of weeks.
两、三个星期吧。
The Red Cross supervised the distribution of food and clothing to the flood victims.
红十字会坚督分配食物和衣物给水灾受害者。
The hunt went on for several weeks, but the puma was not caught.
搜寻工作进行了好几个星期，但始终未能逮住那只美洲狮。