1.
She has invited a friend to visit her family.
下面我们来做代换练习。
2.
Mary is more ambitious than Peter.
现在我们来做代换练习。
3.
isotopically exchangeable phosphat
同位素代换的磷酸盐
4.
systematic production of substitution lines
系统的产生代换品系
5.
substitution deletion and insertion error
代换删除和插入误差
6.
substitution deletion and insertion errors
代换删除和插入错误
7.
convertible terms
同义语，可代换用语
8.
A substitution, an exchange, or an interchange.
交换代替、交换或互换
9.
DS, D.S. (degree of substitution)
取代度,置换[程]度
10.
clearing agency participant
清算代理,交换代理人,清算代理交易
11.
Dynasties rise and fall.
朝代起起落落(王朝一代代的变换)。
12.
We are of the second generation, now being replaced by the third.
第二代是我们这一代，现在换第三代。
13.
solutions, such as switches, that replace PBXes;
替代用户交换机的解决方案，如交换器；
14.
substitute character
代替记号, 置换字符
15.
transcoding colour television signals
代码转换彩色电视信号
16.
American Standard Code for Information Interchange
美国信息交换标准代码
17.
ASCII(American Standard Code for information interchange)
美国信息互换标准代码
18.
convert code into ordinary language.
把代码转换成普通语言。