"old age is not for sissies" "he's showing his years" "age hasn't slowed him down at all" "a beard white with eld" "on the brink of geezerhood"
old age是什么意思
superficial similarity是什么意思
keep track是什么意思
lose track是什么意思
track performance是什么意思
track system是什么意思
wrong track是什么意思
track vehicle是什么意思
footsteps是什么意思
risk-free是什么意思