While documentation was certainly provided, the general populace never got the in-depth to really explore the nooks and crannies of the language, let alone write their own compiler.

虽然微软提供了文档，但一般的开发人员不可能真正深入到语言的底层，更不用说编写自己的编译器了。

youdao

He cannot speak French let alone write it.

他不会讲法语，更谈不上写作了。

youdao

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。

youdao

It clearly was not easy to live, let alone write.

WSJ: Wall Street Journal: Twelve Months of Reading

Without long-term, paid-up capital, it is hard to write multi-year policies, let alone to organise insurance-backed bond issues or derivatives.

ECONOMIST: Lloyd��s of London

When she began to write, shortly after the war had ended, it was hard to get hold of cream, let alone capers.

ECONOMIST: What cookbooks really teach us