We would like to point out that delivery before Christmas is essential and hope you can offer us that guarantee.
我们想指出圣诞节前交货很重要并希望贵方能就此向我们作出保证。
But having satisfied the requirements of practical necessity, most people go no further.
但是,大部分人在满足了实际需要后,就不再继续发展这种能力了。