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。
Well, you just need lots of practice. The more you listen to English, the easier it becomes.
噢,你需要大量的练习。英语你听的越多,就越容易听懂。