german proficiency
德国的熟练程度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
To expand one's German vocabulary is key to improvement of one's German proficiency.
扩大德语词汇量是提高德语水平的关键问题。
youdao
Potential candidates must be able to read, write and speak English. German proficiency would be an added bonus.
求职者必须具备良好的英语听说读写能力，会德语者优先考虑。
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