and when the samples quantity is large the cost shall be charged accordingly however the cost and freight paid by the clients will be deducted in the trial orders in cases particular for instance the clients with long term and firm relations we can pay the freight in advance with the samples free after approved by the manager of the departments or by the general manager if the amount is large

而当样品数量大的成本应收取相应的费用，但成本和运费支付的客户将在试验订单中扣除，在特殊情况下，例如客户与长期和坚定的关系，我们可以提前支付运费与样品免费后批准的部门经理或总经理，如果金额大

以上为机器翻译结果，长、整句建议使用 人工翻译 。