啊~如果我面對緊o既煩惱可以用元素作比喻.....我諗我個一粒鈉,有一日,我終於遇見到一粒氟,正常會點,讀化學o既同學都知,但係兩粒元素都唔知點解,唔見左好重要o既離子鍵,讀化學o既同學都會點,唉........離子鍵啊~離子鍵啊~你去左邊啊?定係我諗錯野,原來我唔係一粒鈉,我係一粒氫呢?