learning efficiency的用法和樣例：
例句
- The little boy is always absent-minded in class, not to say his study efficiency after class.
這個小男孩在課上總是心不在焉，更不要說他課後的學習效率了。 - The experiment shows that autonomous class teaching activities can not only develop the potential of learners' autonomy, but also improve their learning efficiency.
實驗結果表明自主式課堂教學活動不僅能開發學習者學習自主性的潛能，還能提高他們的學習效率。
