步冲轮廓法
Nibble \Nib"ble\, v. t. [imp. & p. p. {Nibbled}; p. pr. & vb. n.
{Nibbling}.] [Cf. {Nip}.]
To bite by little at a time; to seize gently with the mouth;
to eat slowly or in small bits.
Thy turfy mountains, where live nibbling sheep. --Shak.