Reax
木质素磺酸盐
🗣️ 情景例句
I'm writing a story for the high-school paper.
我正在为高中校刊写一篇东西。
How much does packing take up of the total cost of the goods?
包装占货物总成本的百分比是多少？
She gazed at it for some time then added,
她凝视着它一会儿，补充道，