80岁用英语怎么说

"Eighty" is the word used to say "80" in English. This number comes from the Middle English word "eghteti," which comes from the Old English word "eahtatig," which ultimately comes from the Proto-Germanic word "aitatigaz."

例句1:
"My grandmother is eighty years old."
翻译: "我的奶奶80岁了。"

例句2:
"Eighty percent of the class passed the test."
翻译: "班上80%的学生通过了考试。"