см. тж. включать
• When ferrous iron takes on oxygen, it turns a ferric red.
• Ammonium chloride can add ( on ) 3 to 6 molecules of ammonia to form complex salts.
• These materials have no tendency to gain protons.
• Thin conductors can be joined to members of similar thickness ...
• The isoalloxazine ring of FAD picks up a hydrogen ion from the solvent.
• An impurity atom which can accept ( or take up ) one or more electrons ...
• The sulphur hexafluoride molecule readily acquires ( or adds on ) free electrons, forming a heavy negative ion.