铁矿合同翻译

关于运输费用计算的一段话，请各位大侠帮忙翻译讲解 the??buyer??may??declare??alternate??discharge??ports,??in??which??case??freight differentials to the alternate discharge ports shall be calculated on an equivalent time charter basis as stated in schedule 5 (freight calculator).??the time charter equivalent used shall be based on the baltic route c10 western australia to china, with pricing based on the quotation period (as defined below) and a bunker rate of the erage of platts shg ifo 380 cst prices for the quotation period (as defined below).