1
qualitatively different from sth
常用于对比两者的本质差异，常与 quantitatively（数量上）相对。
The new approach is qualitatively different from the old one.
这种新方法在性质上迥异于旧方法。
质量上；定性地
先理解核心含义，再看它在真实句子里的用法。
质量上；定性地
in a qualitative manner
The new approach is qualitatively different from the old one.
这种新方法在性质上迥异于旧方法。
以定性的方式。
In a qualitative manner.
关于质量而非数量。
With respect to quality rather than quantity.
The two proposals are qualitatively different, even though they cost the same.
这两项建议在质量上不同，尽管费用相同。
We need to assess the results qualitatively before we look at the numbers.
我们需要在查看数字之前先定性地评估结果。
Their service has improved qualitatively since the new manager arrived.
自从新经理来了以后，他们的服务在质量上有了改进。
常用于对比两者的本质差异，常与 quantitatively（数量上）相对。
The new approach is qualitatively different from the old one.
这种新方法在性质上迥异于旧方法。
表示从性质或质量角度评估，而非数量角度；也可说 qualitatively assess sth。
We need to assess the results qualitatively.
我们需要定性地评估这些结果。
作句首状语，用逗号隔开，表示从质量或性质层面来看待整个句子。
Qualitatively, the two products are very similar.
从质量上看，这两种产品非常相似。
Not this
The two teaching methods are qualitative different in their outcomes.
Use this
The two teaching methods are qualitatively different in their outcomes.
different 是形容词，需要副词修饰；qualitative 是形容词，不能修饰形容词，应改为副词 qualitatively。中文“质量上不同”容易误用形容词。
Not this
There was a qualitatively change in the patient's condition.
Use this
There was a qualitative change in the patient's condition.
change 是名词，需要用形容词 qualitative 来修饰；qualitatively 是副词，不能修饰名词。中文“质的变化”中“质的”对应形容词，而非副词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
性质上不同的
The two approaches are qualitatively different in their outcomes.
这两种方法在结果上性质不同。
性质上相似的
Although the results are qualitatively similar, the sample sizes differ.
尽管结果性质上相似，但样本量不同。
性质上截然不同的
The new evidence is qualitatively distinct from what we saw before.
新证据与我们之前所见性质上截然不同。
定性评估
Teachers often qualitatively assess students' participation in class.
教师通常定性评估学生在课堂上的参与度。
定性评价
The committee will qualitatively evaluate the proposals before ranking them.
委员会将在排序前对提案进行定性评价。
从性质上说
Qualitatively speaking, the revised version is much better.
从性质上说，修订版要好得多。
Use qualitatively naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
词根是quality（质量），所以qualitatively是“在质量上/定性地”；对比quantitatively（数量上）——一个谈质地，一个谈数字。
语域：formal 常见场景：学术论文、研究报告 通常用于学术或正式文体，表示“在性质上”或“定性地”，日常口语中比较少见。
这些词都不与 qualitatively 完全押韵。relatively、quantitatively、alternatively、creatively 都以 -atively 结尾，但重音位置或元音不同；positively 和 actively 以 -ively 结尾，拼写相似但发音不同。quantitatively 发音最接近，但重读元音后的 /nt/ 与 qualitatively 的 /l/ 不同。
Dictionary facts from ECDICT, WIKTIONARY.