He didn't allow himself to show his satisfaction, of course, let alone to speak of it.
当然，他没有让自己流露出满意的神色，更不会说出这种心情了。
He cannot speak French, let alone write a letter in it.
他不会说法语，更谈不上用法语写信了。
I can't speak English, let alone French or German.
我不会说英语，更别提法语或德语了。
He doesn't even speak his own language well, let alone French.
本国语他都说不好，更不必提法语了。
He can not speak English, let alone French.
他连英语也不会，更不用说法语了。
He can speak Spanish, let alone English.
他能说西班牙文，英语就更不在话下了。
He cannot speak French let alone write it.
他不会讲法语，更谈不上写作了。
I wouldn't speak to him, let alone trust him and lend him some money.
我理都不愿理他，更谈不上信任他，把钱借给他了。
He cannot speak French let alone write a letter init.
他不会说法语，更谈不上用法语写信了。
He doesn't even speak his own language well, let alone French.
他连自己的本族语都讲不好，更不用说法语了。
He doesn't even speak his own language well, let alone French.
他连自己的本族语都讲不好，更不用说法语了。
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