２１年

• Traditional Chinese Character(HanT): ２１年
• Simplified Chinese Character(HanS): ２１年
• Bopomofo(Mandarin Phonetic Symbols): ㄦˋ ㄧ ㄋㄧㄢˊ (ㄦㄧㄋ)
• Bopomofo(Zhuyin Keyboard Input/IME): "-4u su06" (-4usu06)
• (ASCII) Hanyu Pinyin: "eryinian" "Er4Yi1Nian2" "Er4 Yi1 Nian2" (EYN)
• (Latin) Hànyǔ Pīnyīn: èrYī [ èr Yī ]
• (英文翻譯) English Translation: "21 years"
• (西語翻譯) Traducción Español: "21 años"
• (日文翻譯) 日本語翻訳: "21年"