No trecho do primeiro parágrafo “and that vary considerably...

        If styles are general characteristics that differentiate one individual from another, then strategies are those specific “attacks” that we make on a given problem, and that vary considerably within each individual. They are the momentby-moment techniques that we employ to solve “problems” posed by second language input and output. Chamot (2005, p. 112) defines strategies quite broadly as “procedures that facilitate a learning task.”

        Second language acquisition has distinguished between two types of strategy: learning strategies and communication strategies. The former relate to input — to processing, storage, and retrieval, that is, to taking in messages from others. The latter pertain to output, how we productively express meaning, how we deliver messages to others.

(Brown, H.D. Principles of Language Learning and Teaching. 5th ed. White Plains, NY: Addison Wesley Longman, 2006. Adaptado)