第一句：This model of typewriter is efficient and endurable, economical and practical for middle school students.
我方这种型号的打字机性能高，耐用，经济，实用，适用于中学生。
A: We are interested in your computer and typewriter.
我们对你方的电脑和打字机感兴趣。
B: This model of typewriter is efficient and endurable, economical and practical for middle school students.
我方这种型号的打字机性能高，耐用，经济，实用，适用于中学生。
A: That's good. Our customers are mainly middle school students.
太好了。我们的顾客主要是中学生。
第二句：The computer we produced is characterized by its high quality, compact size and it's also energy—saving, easy to learn and easy to operate.
我们生产的电脑质量好，体积小，省电，容易学习和操作。
A: The computer we produced is characterized by its high quality, compact size and it's also energy—saving, easy to learn and easy to operate.
我们生产的电脑质量好，体积小，省电，容易学习和操作。
B: So it is easy for young children.
所以孩子学起来很容易。
A: Yes. Suitable for middle school students.
是的，很适合中学生。
词汇精学：
1. efficient adj. 有效率的;有能力的;生效的
eg. I've been looking out for an efficient teaching method.
我一直在寻求一种有效的教学法。
endurable adj. 能忍耐的;可忍受的;能持久的
eg. That was belief, Confucius answered: insufficient food was endurable but without belief meant nothing.
孔子说，那就选信仰，没有粮食没有关系，没有信仰什么东西都谈不上。
economical adj. 经济的;节约的;合算的
eg. We must find economical methods for extracting oil from shale.
我们必须找到从页岩中采油的经济方法。
eg. The government should take effective measures to live through this economical crisis.
政府应采取有效的措施度过这场经济危机。
practical adj. 实际的;实用性的
eg. The booklet is very practical and handy of reference.
这本小册子很实用， 而且便于查考。
eg. The new collections of custom furs around town reveal plenty of folderol, but there are practical things too.
市上大批新的定做的皮衣中有许多是华而不实的， 但也有一些实用的东西。
短语学习：
be characterized by 具……的特性;以……为特征
eg. Governance may be characterized by the sorts of decisions that need to be made at certain control points within the process.
治理的特点可能在于一些需要在过程中特定控制点制定的决策。
其他表达法：
This machine will pay back your investment in 6 months.
这台机器将使你在六个月内赚回成本。
口语表达：
1. Suitable for middle school students.
2. high quality, compact size and it's also energy—saving, easy to learn and easy to operate.
3. efficient and endurable, economical and practical for middle school students.
1. 很适合中学生。
2. 质量好，体积小，省电，容易学习和操作。
3. 性能高，耐用，经济，实用，适用于中学生。
