| 1 | A child's hands are covered in tobacco residue after harvesting leaves. | |
| 2 | It leaves waxy residue that can either be skimmed from the surface or sink to the bottom of the ocean. | |
| 3 | The essence of pearl mixed with essence of men and a curious dark residue was precipitated. | |
| 4 | As some of the earliest had straight rather than spiral grooves, it is thought the purpose may have been to receive the powder residue or fouling that was a problem with early firearms. | |
| 5 | Non-organic formula can contain the same or higher amounts of chemical residues left over from its raw materials. |
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