7，However you decide to spend your time, one thing is certain: you will arrive at your destination fresh and uncrumpled.

However意为"不管，无论", 为连接动词，引导让步状语从句。

fresh and uncrumpled意为"精神焕发，毫无倦意"

冒号后面的部分为one thing的同位语。新概念英语2

Exercise:

1，An aeroplane journey invariably provides such distractions as _____ .

a. the thought that one has not long to wait before arriving

b. the exhilarating quality of the air one breathes at 30,000 feet

c. being able to watch a film or drink champagne

d. the marvellous views of land or clouds you can see from the plan

2，----and enjoy good food _____ , of course, that the sea is calm.

a. provided    b. in the event    c. in case    d. if only

3，If it is not and you are _____ , no form of transport could be worse.

a. probably seasick   b. bad at sailing    c. sick of the sea    d. prone to seasickness

4，设法别老是想着疼。(汉译英)

5，If the landscape is hidden from view, you can enjoy the extraordinary sight of unbroken cloud plains that stretch our for miles before you, while the sun shines brilliantly in a clear sky.（英译汉）

6，Why is it difficult to read on a train?