Heelbone
un. 髂骨；跟骨\\n
??? 情景例句
I need to fit a fourth operation into his schedule.
我得在他的工作表上再加第四個手術。
To play the guitar
彈吉他
The most surprising thing about it, however, is that it can land anywhere: on snow, water, or even on a ploughed field.
雪地上，水面上，甚至剛耕過的田里。