1.
Tom can't have written this because it is in French and he doesn't know French.
汤姆决不会写这东西，因为它是用法文写的他不懂法文。
2.
He does not know English, to say nothing of German or French.
他不懂英文，更不要说德文和法文了。
3.
George doesn't know French, to say nothing of Chinese.
乔治不懂法文，更不用说懂中文了。
4.
I understand the gist, but cannot tell whether or not it is fluent and grammatical.
他写的大意，我约略懂得，文法通不通，我不知道。
5.
He knows neither French nor Russian .
他既不懂法语也不懂俄语。
6.
His confession of ignorance of French is, ipso facto, a confession of unfitness for his present office.
他承认不懂法文，事实上就等于承认不适合担任他现在的职务。
7.
He pretends he cannot speak nor understand Chinese.
他假装既不会说中文，又听不懂中文。
8.
He knows Latin, not to say English.
即不是说英文，拉丁文他也懂得。
9.
He read the message but he couldn't understand it.
他读了电文，但他不懂是什么意思。
10.
He doesn't understand Greek, so I offered to translate.
他不懂希腊文, 我主动给他翻译.
11.
I try to make him understand, but he never gets the message.
我设法让他明白，但他总是听不懂。
12.
His indistinct speech made it impossible to understand him.
他口齿不清, 无法听懂他的意思.
13.
He really did not understand the value of the historic relics.
他根本不懂得这历史文物的价值。
14.
The whole menu was written in Dutch, which he didn't understand.
所有的菜单都是荷兰文，他看不懂。
15.
He knows Latin and Greek, let alone English.
他懂拉丁文和希腊语，英语更不在话下。
16.
He has small French and less German.
他不大懂法语，德语更不行。
17.
He does not know English, not to speak of German or French
他不懂英语,更不要说德语或法语
18.
He do not know English, to say nothing of german or French.
他不懂英语，更不用说德语或法语。