accidental的名詞：?accidentals
adj.意外的，非主要的，附屬的
n.非本質屬性，次要方面
形容詞accidental:
1. associated by chance and not an integral part
同義詞：adventitious
2. occurring or appearing or singled out by chance
同義詞：casual, chance
3. without intention (especially resulting from heedless action)
同義詞：inadvertent
例句:
We still don't know the cause of his accidental death.
我們至今仍未知曉他意外死亡的原因。
You need to remember the accidentals in this song.
妳需要記住這首歌裏的臨時變音記號。