A change , or mutation , happens when the order of the letters changes.
当这些字母的排列顺序有所变化时, 就会发生基因突变.
来源:互联网摘选Combines files to produce form letters, mailing labels, envelopes, and catalogs
组合文件以生成套用信函、邮件标签、信封及分类
来源:互联网摘选Would you change places with me? We have been exchanging letters for a year.
你可以跟我交换一下座位 吗.
来源:互联网摘选Now the letters have been retranslated, comprehensively annotated and there are 20 new items.
本书,信件已重译, 包括20个新注释.
来源:互联网摘选Letters and postcards poured into the newspaper office in answer to the appeal for suggestions.
信函和明信片大量涌向报社办公室,以响应征求建议的要求.
来源:互联网摘选
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