There is nothing so admirable as a man whose sacrifices his life and happiness for others.

Nobody can work well if he is distracting .

The only way to conquer a fear is to face it, and doing so as frequently as possible.

It is when you nearly lose someone when you become fully conscious of how much you value them .

Many visitors to the United Kingdom go straight to London and never set foot outside the capital—which is a pity, for those that do are often surprised at the sheer variety of landscapes 1 within such a small geographical area. 2 you want to see stunning, unspoilt scenery you should 3 spend a few days in one of Britain"s largest areas of protected countryside, a national park. 4 in the second half of the 20 ^th century after popular pressure for access 5 the country"s wilder places, there are now 15 of them throughout the British Isles.
The biggest is the Cairngorms in northern Scotland, named 6 some of the country"s highest mountains and the best place for skiing. Pony-trekking, climbing and fishing are also 7 , along with Scotland"s national game, golf. 8 enthusiasts are well rewarded—this is the home of the red deer, red squirrel and golden eagle, If you don"t like the 9 to the highest point, some 2000 metres 10 sea level, you can take the railway 11 gets you to the summit in less than ten minutes. 12 the west of the park is another popular natural 13 , Loch Ness. The lake is over 200 metres 14 in places, and salmon, trout and eels are in abundance here.
Over the border in England is the Lake District, 15 made famous by Romantic poets such as William Wordsworth two hundreds years ago. People have been 16 here en masse since 1847 17 a railway was built to its biggest lake, Windermere. 18 in the past boats plied its waters 19 stone, timber and wood, today"s craft are more likely to carry 20 on pleasure cruises—over a million a year, in fact.

It is when you nearly lose someone when you become fully conscious of how much you value them .

After reading the novel he was too exciting to go to sleep that night.

All male guests at this restaurant are respectfully requested that they are put on coat and tie.

It took years for Einstein"s theory to gain acceptably .

Cars turn into dead weapons when they are driven carelessly.

Have run out of fuel, the plane crashed to the ground.

一个马尔可夫信源有3个符号{u 1，u 2，u 3}，转移概率为：p（u 1|u 1）=1/2，p（u 2|u 1）=1/2，p（u 3|u 1）=0，p（u 1|u 2）=1/3，p（u 2|u 2）=0，p（u 3|u 2）=2/3，p（u 1|u 3）=1/3，p（u 2|u 3）=2/3，p（u 3|u 3）=0，画出状态图并求出各符号稳态概率。