我不满意你前两篇论文，但这些很出色。
I'm not happy with your first two essays, but these ones are excellent.
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These英 /ðiːz/|美 /ðiz/
ones英 /wʌnz/|美 /wʌnz/
解释
these ones=这些论文，用ones代替前文提到的essays（论文）避免重复，these指近处的复数替代
I'm not happy with your first two essays, but these ones are excellent.
these ones=这些论文，用ones代替前文提到的essays（论文）避免重复，these指近处的复数替代