Polymer degradation
[化] 聚合物降解
🧩 词语组成解析
🗣️ 情景例句
To have a friend -- a pal.
想要一个朋友 一个伙伴。
Without practice, hopes will be reduced to zero.
没有实践，希望会化为乌有。
sailing vessels like the Cutty Sark were used to carry tea from China and wool from Australia.
“卡蒂萨克”号之类的帆船被用来从中国运回茶叶，从澳大利亚运回羊毛。