夜以继日
Traditional form:
夜以繼日
Pinyin (reading):
yèyǐjìrì
Definitions:
- night and day (idiom); continuous strenuous effort
Characters:
- 夜 - night, dark; under cover of night
- 以 - according to; so as to; because of; then
- 继 - to continue, to carry on; to succeed, to inherit
- 日 - sun; day; daytime
Traditional characters: