"a positive attitude"
"the reviews were all positive"
"a positive benefit"
"a positive demand"
"were convinced that it would be to their advantage to join"
"I am positive he is lying"
"was confident he would win"
"a plus (or positive) factor"
"a positive pregnancy test"
"positive laws"
"incontrovertible proof of the defendant's innocence"
"proof positive"
"an irrefutable argument"
"positivist thinkers"
"positivist doctrine"
"positive philosophy"
"positive increase in graduating students"
"positive numbers"
"protons are positive"
"an arrogant and cocksure materialist"
"so overconfident and impudent as to speak to the queen"
"the less he knows the more positive he gets"
I am positive that he will agree with me.
我很肯定他会同意我的建议。