-paynoheedto...;totallyunconcerned[inattentive];wantingincare;inacarelessway;inadvertent;withaquieteasinessofbearing;absent-minded;withindifference[nonchalance];careless;casual;negligent:
Herepliedwithacasualair.他漫不经心地回答。
Throughhislackofattentiontothegamehehadputhiswhitestoneintoa“tiger'smouth”formedbythreeblackstones.由于他漫不经心地下棋，他的白子掷到黑子的虎口里去了。