For example, in Fire Ball, the title character's characteristic stance and expressions, or key points in the movement of Fire Ball's limbs, would be drawn in detail. This generally requires high levels of skill and experience to be able to really get the spirit of the character to show through, and the importance of succeeding at this is part of why they're known as "key" frames.
譬如紅孩兒特殊的招牌表情和姿勢、或雙手雙腳動作中起承轉合等關鍵畫面，通常需要較高的技術與經驗，才能畫得傳神，因此叫「原畫」。