回上一层第叁部 第叁课 --- 请重复跟读，直到可以於声音档的留空之间唸完整句為止；熟练之后您必将可以 "脱口而出" 地说出标準的美式英语
- by and large
- By and large the work of the media is necessary.
- by heart
- In elementary school I learned multiplication by heart.
- by oneself
- A child was sleeping there by himself.
- I can't finish this job by myself.
- by the way
- By the way, there is a stain on your shirt.
- By the way, have you seen today's news?
