I think the annual sale of300 pianos for a sole distributorship in Canada is rather conservative. 我认为对加拿大整个地区的独家经销来说,年销售量三百架钢琴未免太保守了。
Any change amendment or modification to this EXCLUSIVE DISTRIBUTORSHIP shall not be valid and binding unless the same is reduced in writing duly signed by all. 任何改变修正或修改这一独家经销不得有效和有约束力的,除非同时减少书面正式签署所有。