很高兴为您解答如下：
Demurrages at both load and discharge ports,if any and if not caused by Seller’s nominated load terminal,will be paid by the Seller to the Buyer at sight,at first and simple written request.Conversely,if demurrages have been caused by the Buyer’s discharge terminal,then the corresponding amount shall be borne by the Buyer to be paid to the Seller at sight,at first and simple written request.Time shall not count against lay time or if the vessel is on demurrage,or demurrage when spent or load.
装卸港产生的延滞费,若非由卖方（这里写错了吧,应该是“Buyer买方”）因素造成的,则卖方应在收到买方简单的书面索赔的第一时间内向其支付此费用,反之,若延滞由买方因素造成,则相关费用应由买方在收到简单书面索赔的第一时间内向卖方支付.装卸时间、船舶已滞期时间或在此期间滞期的时间均不计.
Time shall not count against lay time or if the vessel is on demurrage,or demurrage when spent or load.
几个or后面的if都是主句的条件状语从句,翻译时将它们作为条件即可.
“装卸时间、船舶已滞期时间或在此期间滞期的时间均不计（在内）”
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