1。She doesn‘t understand the difference between right and wrong。她不能明辨是非。
2。This model represents the best compromise between price and quality。這種型號是價格和質量間的最佳折中方案。
3。The new law makes no distinction between adults and children。這項新法律對成人和孩子同等對待。
between, 是介詞,表示“兩者之間”
and,是連詞,表示“和、與”