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。