primary influence primary influences primary information primary ingredient primary ingredients primary injection primary input primary insomnia primary inspection primary instrument primary instruments primary insurance primary intention primary interest primary interests primary interface primary international primary investigator primary issue primary issues primary job primary jurisdiction primary key primary keys primary keyword primary language primary language spoken primary languages primary law primary layer primary legal primary legislation primary level primary levels primary life primary light primary line primary link primary liver primary location primary loop primary love primary lung primary machine primary mandate primary market primary markets primary material primary materials primary meaning primary means primary means of communication primary measure primary mechanism primary mechanisms primary medical primary medical care primary medium primary member primary members primary memory primary menu primary message primary metabolite primary metal primary metals primary method primary methods primary military primary mirror primary mission primary missions primary mode primary model primary motivation primary motivations primary motivator primary motive primary motor primary mouse primary national primary natural primary navigation primary need primary needs primary network primary object primary objective primary objectives primary obligation primary obstacle primary occupation primary one primary ones primary operating primary opponent primary optical primary or secondary primary or secondary amine