改进题：please be informed that,on account of the fluctuations of foreign exchanges the quotation is subject to change without previous notice.
译文：兹告知贵方，外汇的波动与价随时可能改变，不另行通知。
改进的译文：兹告知贵方，由于外汇的波动，报价随时可能改变，不另行通知。
改进题：please be informed that,on account of the fluctuations of foreign exchanges the quotation is subject to change without previous notice.
译文：兹告知贵方，外汇的波动与价随时可能改变，不另行通知。
改进的译文：兹告知贵方，由于外汇的波动，报价随时可能改变，不另行通知。
