既 + Adjective A + 又/也 + Adjective B
既 (jì) is used in the pattern 既…又/也… to express that two qualities or conditions apply simultaneously, meaning "both...and..." It emphasizes that two attributes coexist in the same subject.
这道菜既好吃又便宜。
Zhè dào cài jì hǎochī yòu piányi.
This dish is both delicious and cheap.
她既聪明又勤奋,大家都很喜欢她。
Tā jì cōngmíng yòu qínfèn, dàjiā dōu hěn xǐhuān tā.
She is both smart and hardworking—everyone likes her.
这个地方既安静又方便。
Zhège dìfāng jì ānjìng yòu fāngbiàn.
This place is both quiet and convenient.