Until now, those guns have been sold primarily on an honour system, wherein the purchasers ensure the sellers they are legally entitled to buy firearms.
到现在为止，那些枪基本是基于荣誉制度而被贩售的，也就是购买者向贩售者保证他们可以合法地购买武器。
《柯林斯英汉双解大词典》
2
The purchasers saw this feature as increasing a car's friendliness.
购买者认为这个特点增加了汽车的友好性。
3
Only those homes offered for sale at competitive prices will secure interest from serious purchasers.