她买的那个是最便宜的。
The one that she bought was the cheapest.
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the英 /ðə/|美 /ðə/|英 /ðiː/|美 /ði/
one英 /wʌn/|美 /wʌn/
that英 /ðæt/|美 /ðæt/
解释
"the + one + that" 聚焦"她买的东西"。that 在定语从句中作宾语（she bought the one），one 替代前文提到的某物品，整个主语结构引出其属性。
The one that she bought was the cheapest.
"the + one + that" 聚焦"她买的东西"。that 在定语从句中作宾语（she bought the one），one 替代前文提到的某物品，整个主语结构引出其属性。