Definition: A pure substance is not mixed with anything else. Level: B1
这条项链是由纯金制成的。
This necklace is made of ___pure gold.
她更喜欢穿纯棉衬衫。
She prefers to wear a ___pure cotton shirt.
这些圆顶是由纯铜制成的。
The domes are made of ___pure copper.
