As a subject matter expert in video gaming, particularly with a focus on rhythm games like Guitar Hero, I can provide a clear definition of an "FC" in the context of the game.

In Guitar Hero, an "FC" stands for "Full Combo." This term is used when a player successfully hits every note in a song without missing any. Achieving an FC is a significant accomplishment because it requires a high level of skill, timing, and concentration. Players who consistently get Full Combos are often considered to be at an advanced level in the game.

Here's the translation into Chinese:

在吉他英雄（Guitar Hero）游戏中，“FC”代表“全连击”（Full Combo）。当玩家在一首歌曲中成功击中每个音符而没有漏掉任何一个时，就会使用这个术语。实现FC是一个重要的成就，因为它需要高水平的技能、时机和专注力。在这款游戏中，能够连续获得全连击的玩家通常被认为是处于高级水平。

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Full Combo, more commonly abbreviated as FC, is the term that refers to beating a song while correctly playing every note without overstrumming. This is different from simply scoring 100% on a song, since one can "break" (reset) their Multiplier, by overstrumming, and still play 100% of the notes.read more >>