所以C为什么错了呢

NO.PZ2018062007000075问题如下 If no cash is initially exchange a swis comparable to a series of forwarcontracts when: A.the swpayments are variable. the combinevalue of all the forwarcontracts is zero.C.all the forwarcontracts have the same agree on price. B is correct. When two parties engage in a series of forwarcontracts aninitially agree on a priof FS0 (T), some of the forwarcontracts have positive values ansome have negative values, but their combinevalue equals zero. A is incorrebecause for a swap, all payments are fixeanequal, not variable. C is incorrebecause forwarprices are terminethe spot prianthe net cost of carry, meaning thforwarcontracts expiring fferent times will have fferent prices, not the same price. 中文解析我们之前学习的forwarcontract，在0时刻的value都是0，多个forwar总在一起也是0，但是swap这边其实会对每一个forwar约做一个变形，也就是老师课中所提到的off-market forwar使得每一个forwar调整到一样的价格，这就导致变形后的每一个forwar0时刻value不为零，有的是正的，有的是负的，但这些forwar总在一起的value和仍然是0。 C怎么描述可以变正确呢？分拆完的每节的forwaroff-market后，使其价格都等于相同的price，这个不叫agreeon price那叫什么呀？

NO.PZ2018062007000075 the combinevalue of all the forwarcontracts is zero. all the forwarcontracts have the same agree on price. B is correct. When two parties engage in a series of forwarcontracts aninitially agree on a priof FS0 (T), some of the forwarcontracts have positive values ansome have negative values, but their combinevalue equals zero. A is incorrebecause for a swap, all payments are fixeanequal, not variable. C is incorrebecause forwarprices are terminethe spot prianthe net cost of carry, meaning thforwarcontracts expiring fferent times will have fferent prices, not the same price. 中文解析 我们之前学习的forwarcontract，在0时刻的value都是0，多个forwar总在一起也是0，但是swap这边其实会对每一个forwar约做一个变形，也就是老师课中所提到的off-market forwar使得每一个forwar调整到一样的价格，这就导致变形后的每一个forwar0时刻value不为零，有的是正的，有的是负的，但这些forwar总在一起的value和仍然是0。 Off the market后就是一样的价格了，不就正是C描述的吗？请帮忙一下

请问为什么一系列的forwarcontra加起来价值等于0？还有为什么swap的现金流的固定的呢？我理解的不应该是一方给固定现金流一方给浮动现金流，浮动现金流肯定不固定呀

the combinevalue of all the forwarcontracts is zero. all the forwarcontracts have the same agree on price. B is correct. When two parties engage in a series of forwarcontracts aninitially agree on a priof FS0(T), some of the forwarcontracts have positive values ansome have negative values, but their combinevalue equals zero. A is incorrebecause for a swap, all payments are fixeanequal, not variable. C is incorrebecause forwarprices are terminethe spot prianthe net cost of carry, meaning thforwarcontracts expiring fferent times will have fferent prices, not the same price. 题目if后面的条件，能不能翻一下中文意思？