Since we are likely to place sizable orders regularly we hope that you will make some special concessions.
由于我方将定期大批量订购,希望贵方作出一些特殊的让步。
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的,因为无法预见到洞穴探险者究竟会遇到什么性质的困难。