把四个动词短句替换成名词或名词词组形式1.not translate rather than translate2.english letters plus chinese characters3.non-professionals instead of professional terms4.english words prior to their chinese translations用于论文目录中，所以要求名词或名词词组形式，但意思不变
问题描述：
把四个动词短句替换成名词或名词词组形式
1.not translate rather than translate
2.english letters plus chinese characters
3.non-professionals instead of professional terms
4.english words prior to their chinese translations
用于论文目录中，所以要求名词或名词词组形式，但意思不变
答
2.the combination of english letters and chinese characters