圖片出處: https://www.nzdl.org/cgi-bin/library?
Optimal input in language acquisition refers to the type and amount of language exposure that is most beneficial for a learner to acquire a new language. Optimal input typically includes language that is comprehensible to the learner, meaning that the learner is able to understand the general meaning of the language even if they do not understand every word or detail. It also includes language that is slightly more advanced than the learner’s current level of proficiency, as this helps to challenge and stimulate language learning.
在語言學習中，最佳輸入指的是最有益於學習者學習新語言的類型和量的語言暴露。最佳輸入通常包括學習者可以理解的語言，這意味着即使學習者不理解每個詞或細節，他們也能理解語言的大意。它還包括略高於學習者當前熟練程度的語言，因為這有助於挑戰和刺激語言學習。
Optimal input may also include a variety of language genres and contexts, such as conversations, stories, news articles, and other types of texts, as well as different accents and dialects. This can help learners to become more exposed to the various forms and functions of the language and to develop a more well-rounded understanding of it.
最佳輸入還可能包括各種語言類型和背景，例如對話、故事、新聞文章和其他類型的文本，以及不同的口音和方言。這可以幫助學習者更多地接觸語言的各種形式和功能，並建立更全面的語言理解。
Finally, optimal input should be provided at a pace that is appropriate for the learner’s ability and level of motivation, and should be presented in a way that is engaging and interesting to the learner.
最後，最佳輸入應以適合學習者能力和動機水平的速度提供，並以引人入勝且有趣的方式呈現。
資料來源: http://www.sdkrashen.com/content/articles/optimal_input_krashen_2020_.pdf