by degrees
US /baɪ dɪˈɡriːz/
UK /baɪ dɪˈɡriːz/

1.
徐々に, 少しずつ
gradually; little by little
:
•
The patient's health improved by degrees.
患者の健康は徐々に改善した。
•
They learned the new language by degrees.
彼らは新しい言語を徐々に学んだ。
徐々に, 少しずつ
gradually; little by little