她掌握了足够的德语和俄语知识。

She has ___a ___working ___knowledge ___of German and Russian.

此外，我掌握了足够的英语、西班牙语、加泰罗尼亚语和意大利语知识。

Furthermore, I have ___a ___working ___knowledge ___of English, Spanish, Catalan and Italian.

在这个领域工作，你需要掌握足够的计算机编程知识。

To work in this field, you need ___a ___working ___knowledge ___of computer programming.