And then this one, we had bf, and now we've got gf.
然後這個，我們有 bf，現在我們有 gf。
來源: Engvid-Gill Course CollectionSo let's write these key points out about gravitational forces, which I'm going to use GF to represent.
那麼讓我們寫下關於引力的這些要點，我將用 GF 來表示。
來源: Khan Academy Middle School Physics - NGSS Middle School PhysicsAnd then this one, we had bf, and now we've got gf.
然後這個，我們有 bf，現在我們有 gf。
來源: Engvid-Gill Course CollectionSo let's write these key points out about gravitational forces, which I'm going to use GF to represent.
那麼讓我們寫下關於引力的這些要點，我將用 GF 來表示。
來源: Khan Academy Middle School Physics - NGSS Middle School Physics探索常見搜尋詞彙