If I did, however, I might use a " fine-tooth comb." The " teeth" of a comb, like the teeth in your mouth, are things that extend down from the top.

然而，如果我这样做了， 我可能会使用“细齿梳子” 。 梳子的“牙齿”，就像你嘴里的牙齿一样， 是从顶部向下延伸的东西。