例句：
This research has done much to advance our understanding of language learning.
這項研究大大提高了我們對語言學習的認識。
Video is a good medium for learning a foreign language.
錄像是一種學習外語的好方法。
All the children must learn a foreign language.
所有的兒童必須學一門外語。
It takes a long time to learn to speak a language well.
學會說好一種語言需要花很長的時間。
The fashion at the time was for teaching mainly the written language.
那時教學時興的主要是書面語。
A good dictionary is indispensable for learning a foreign language.
一本好詞典是學習外語必備的。