常見(jiàn)例句There is only one ball pen in the pencil box.這鉛筆盒里只有一支圓珠筆。No ball point within a quarter of a mile was safe from his stubby little fingers.凡在四分之一哩范圍內(nèi)的圓珠筆沒(méi)有哪一支能逃過(guò)他粗短的小手指。 返回 ball-point