And then this one, we had bf, and now we've got gf.
然后这个，我们有 bf，现在我们有 gf。
Source: Engvid-Gill Course CollectionSo let's write these key points out about gravitational forces, which I'm going to use GF to represent.
那么让我们写下关于引力的这些要点，我将用 GF 来表示。
Source: Khan Academy Middle School Physics - NGSS Middle School PhysicsAnd then this one, we had bf, and now we've got gf.
然后这个，我们有 bf，现在我们有 gf。
Source: Engvid-Gill Course CollectionSo let's write these key points out about gravitational forces, which I'm going to use GF to represent.
那么让我们写下关于引力的这些要点，我将用 GF 来表示。
Source: Khan Academy Middle School Physics - NGSS Middle School PhysicsExplore frequently searched vocabulary
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