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developmental + noun
developmental常用于医学、心理学领域，修饰stage, disorder, milestone等名词。
The child is going through important developmental stages.
这个孩子正在经历重要的发育阶段。
发展的；与发育有关的
先理解核心含义，再看它在真实句子里的用法。
发展的；与发育有关的
relating to or involved in development
The child is going through important developmental stages.
这个孩子正在经历重要的发育阶段。
与发展相关的。
Related to development.
The child's developmental milestones, such as walking and talking, are progressing normally.
孩子的发展里程碑，比如走路和说话，正在正常推进。
The company's developmental strategy focuses on expanding into emerging markets.
该公司的发展战略侧重于拓展新兴市场。
Researchers are studying the developmental stages of language acquisition in infants.
研究人员正在研究婴儿语言习得的发展阶段。
developmental常用于医学、心理学领域，修饰stage, disorder, milestone等名词。
The child is going through important developmental stages.
这个孩子正在经历重要的发育阶段。
用于强调某事物与发育过程相关，常用于对比正常与异常。
These changes are purely developmental and not pathological.
这些变化纯粹是发育性的，并非病理性的。
Not this
developmental countries
Use this
developing countries
Developmental 是形容词，意为‘发展的’或‘发育的’，通常修饰过程或阶段；而 developing 是现在分词作形容词，意为‘发展中的’，用于描述正在发展的国家、经济体等。应使用 developing 来修饰 countries。
Not this
The developmental of the project
Use this
The development of the project
Developmental 是形容词，不能用作名词表示‘发展’这个概念。正确名词形式是 development。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
发展阶段
Children go through various developmental stages as they grow.
儿童在成长过程中经历不同的发展阶段。
发育过程
The developmental process is influenced by both genetics and environment.
发育过程受遗传和环境的共同影响。
发展里程碑
Doctors track a child's developmental milestones to ensure healthy growth.
医生追踪儿童的发展里程碑以确保健康成长。
发育迟缓
Early intervention is crucial for children with developmental delays.
早期干预对发育迟缓的儿童至关重要。
发育障碍
Autism is one of the most common developmental disorders.
自闭症是最常见的发育障碍之一。
发展心理学
She specialized in developmental psychology during her PhD.
她在攻读博士学位期间专攻发展心理学。
Use developmental naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Develop（发展）+ mental（心智）→ 发展的，与发育有关的
语域：neutral 常见场景：developmental biology、child development、education developmental 为中性偏正式词汇，多用于学术和专业技术语境，如生物学、心理学和教育学等领域，日常口语中较少单独使用。
常作定语，修饰名词
Dictionary facts from ECDICT, WIKTIONARY.