America wants Japan to meet import targets for some American goods. An unwilling Japan has decided to draw the line. Once, when Japan faced pressure from abroad, it would either give in reluctantly or keep quiet and hope that the fuss would die down. No longer, it seems. The Clinton administration strongly believes in exerting such pressure .Its policy is to open some Japanese markets （which it deems to be closed）by setting import targets-an approach to trade policy that supporters call "results-oriented", This ugly term foreshadows uncertain consequences. Far from capitulating to this new thrust of American trade policy, Japan is taking a stand that could lead to a trans-Pacific confrontation. Japan’s government is deeply opposed to what America’s trade representative, Mickey Kantor, has called a new policy geared to "quantifiable results" for some products. Instead, Japan is undertaking a detailed defense of its record on trade.

1、What is the meaning of "draw the line"?
2、Could you guess what sort of "pressure" the writer refers to?
3、What does "defense" mean?