fluency

Most standardized tests evaluate a student's speaking fluency and grammatical accuracy.

(Chinese) 大多数标准化考试都会评估学生的口语流利度和语法准确性。

His total fluency in Japanese allowed him to work as a high-level translator for the embassy.

(Chinese) 他精通日语，这使他能够担任大使馆的高级翻译。