I don't believe a single formal textbook on cybernetics was ever written in English.

我认为没有一本正式的控制论教科书是用英文写成的。

youdao

In addition to mathematics and foreign languages (New Concept English), so should any textbook.

除数学和外语(新概念英语)之外，对任何课本都应如此。

youdao

There are 18 units in our English textbook.

我们的英语课本有18个单元。

youdao

There are 18 units in our English textbook.

我们的英语课本有18个单元。

youdao