英语翻译去年有许多进口商都弃货了.我们很多的余款至今才收回来.因为不想再重蹈那样的覆辙,所以公司硬性规定了这样的付款方式

Last year many importers dropped the sales conformation with us,and we got the final payments till this year.In order to avoid this happens again,our company reluctantly made such rules about payment.I hope you can understand us.If we book shipping space,we can accept 30% down payment and 70% at sight of B/L.
绝对人工翻译