【词汇讲解】
1.opaque：If an object or substance is opaque, you cannot see through it. 不透明的
如：The once clear mountain stream is now polluted and opaque.
曾经是很清澈的山溪, 现在受到污染变得混浊了。
The report was written in long, opaque sentences.
报告中的句子又长又难懂。
2.synthetic polymer：often referred to as "plastics", such as the well-known polyethylene and nylon.合成聚合物
3.high-heeled：High-heeled shoes are women's shoes that have high heels. 高跟的
4.Slip on：put on with ease or speed 快速穿上
如：Slip your clothes on and come with me.
快穿上衣服跟我来。