of one's own volition
出于自己的选择
that one chooses or has chosen
自选的
the college of her choice.
她自己选中的大学。
Preferred above others of the same kind or set
优先选择的：在同一类或同一组中比别的更受欢迎的
“the much used leveraged buyout as the weapon of choice”(&b{Alison Leigh Cowan})
“把举债经营、全部收买的老办法当作特别武器”(&b{艾利森·利·考恩})