opaque plastic 不透明塑料
It was one of the first diaries to bottle milk in opaque plastic, but now they're using clear plastic again.
这是最早用不透明塑料瓶装牛奶的奶牛场之一，但现在他们又用回透明塑料瓶了。
youdao
Maybe my paper should write about those opaque plastic bottles.
也许我的论文应该写那些不透光的塑料瓶。
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