Question

of his long life was having a healthy lifestyle是什么意思

Answer 1

他长寿的秘诀是拥有一种健康的生活方式。

追答

前面少了The secret

Answer 2

?secret of his long life was having a healthy lifestyle
=>他长寿的秘诀是有一个健康的生活模式

Answer 3

一个健康的生活方式是他长寿的秘诀。