actuality /ˌæktʃuˈæləti/ Jane thinks that they will probably marry in actuality but that he can not love the vain, shallow woman. /ˈwʊmən/
vain men can be jsut as vain as women /ˈwɪmɪn/ 男人有时和女人一样虚荣
The instructor struggled vainly to open his parachute. 教官拼命想打开降落伞，但是没有成功。
parachute -> chute -> log chute 原木溜槽 原木滑道
plural:
woman /ˈwʊmən/-> women /ˈwɪmɪn/ 参照 Apophony https://en.wikipedia.org/wiki/Apophony
sound change 的理论
