1. 他是個可愛的老頭。九十高齡，已有些年邁昏庸，他連星期幾也弄不清楚了。
   He's a dear old chap, but0over ninety and in his second childhood. He couldn't tell you the day of the week.
2. 祖父就要80高齡了，但仍精神矍鑠。
   Grandfather will be80 years old, but he is hale and hearty.
3. 他在九十高齡時去世。
   He kicked in at the ripe old age of90.
4. 他已90高齡，但身體功能都很好。
   He is 90 but still retains (the use of) all his faculties.

高的英語翻譯：

齡的英語翻譯：