This response to the commentaries on our conceptual review article on structural complexity and learning difficulty in second language acquisition (SLA) clarifies the scope and objectives of our framework, the challenges of defining and measuring complexity and difficulty, and the broader relevance of our proposal for both empirical research and theory building in SLA, including its relationships to frameworks such as complexity–accuracy–fluency (CAF).

中文翻译：

---

论伞和综合巴士：对公开同行评论的回应


对我们关于第二语言习得 （SLA） 的结构复杂性和学习困难的概念性评论文章的评论的回应阐明了我们框架的范围和目标、定义和衡量复杂性和难度的挑战，以及我们提议在 SLA 中进行实证研究和理论构建的更广泛相关性，包括它与复杂性-准确性-流畅性 （CAF） 等框架的关系。