1
an appreciable + noun
appreciable 作定语，强调数量或程度大到足以被注意到或衡量。
The new policy had an appreciable effect on prices.
新政策对价格产生了明显的影响。
可感知的；可观的；明显的
先理解核心含义，再看它在真实句子里的用法。
可感知的；可观的；明显的
Large or important enough to be noticed or measured.
The new policy had an appreciable effect on prices.
新政策对价格产生了明显的影响。
Both detectable and at least modestly substantial: large enough to be estimated and to be of practical relevance.
Synonym of detectable.
The new policy produced an appreciable change in the company's profits.
新政策给公司利润带来了明显的变化。
There is an appreciable difference in taste between these two brands of coffee.
这两种咖啡品牌在味道上有明显的差别。
After months of practice, she made appreciable progress in her English.
经过几个月的练习，她在英语上取得了可观的进步。
appreciable 作定语，强调数量或程度大到足以被注意到或衡量。
The new policy had an appreciable effect on prices.
新政策对价格产生了明显的影响。
作表语时，主语常是 change, difference, effect 等抽象名词。
The difference between the two versions is appreciable.
两个版本之间的差异是明显的。
常与 amount, number, quantity 等词连用，表示“相当多的”。
They saved an appreciable amount of money.
他们节省了一笔相当可观的钱。
Not this
I am appreciable for your help.
Use this
I am appreciative of your help.
appreciable 意为“可感知的、可观的”，并不表示“感激的”；表达“感激的”要用 appreciative，并且固定搭配是 be appreciative of something。因此把 appreciable 改成 appreciative of 后，语义和搭配都正确。
Not this
The price increased appreciable last year.
Use this
The price increased appreciably last year.
appreciable 是形容词，不能修饰动词；修饰动词表示“显著地、可观地”时必须用副词 appreciably。改成 appreciably 以后，它正确修饰了 increased，符合英语中副词修饰动词的规则。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
可观的量，相当大的数量
The project required an appreciable amount of time and money.
这个项目需要相当多的时间和金钱。
明显的差异
There was no appreciable difference between the two methods.
这两种方法之间没有明显差异。
显著的影响
The new policy had an appreciable effect on consumer spending.
新政策对消费者支出产生了显著影响。
显著的冲击，可观的影響
The storm had an appreciable impact on local agriculture.
这场风暴对当地农业产生了显著影响。
明显的变化
After treatment, patients showed an appreciable change in their symptoms.
治疗后，患者的症状出现了明显变化。
Use appreciable naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 apprec- 想成 appreciate（察觉、欣赏），-able 是“可…的”：能察觉到、值得注意的量，就是 appreciable——可观、明显。
语域：formal 常见场景：学术写作、正式报告、技术文档 appreciable 多用于正式或书面语境，表示“明显可感知的、可观的”。在口语中通常用 noticeable 或 significant 代替。
这些词没有一个与 appreciable 完全押韵。appreciate /əˈpriːʃieɪt/ 与 appreciable 共享开头的 /əˈpriːʃ/，但 -ate /eɪt/ 和 -able /əbl/ 结尾不同；specious /ˈspiːʃəs/ 有相近的 /iːʃ/，但后面的音不同。precious /ˈpreʃəs/、delicious /dɪˈlɪʃəs/、sociable /ˈsoʊʃəbəl/、negotiable /nɪˈɡoʊʃəbəl/ 只是拼写或外貌相似，读音并不相同。
Dictionary facts from ECDICT, WIKTIONARY.