Listen! The music sounds very _________.

        由是先主遂诣亮，凡三往，乃见。因屏人曰：“汉室倾颓，奸臣窃命，主上蒙尘。孤不度德量力，欲信大义于天下；而智术浅短，遂用猖蹶，至于今日。然志犹未已，君谓计将安出？”
        亮答曰：“自董卓已来，豪杰并起，跨州连郡者不可胜数。曹操比于袁绍，则名微而众寡。然操遂能克绍，以弱为强者，非惟天时，抑亦人谋也。今操已拥百万之众，挟天子而令诸侯，此诚不可与争锋。孙权据有江东，已历三世，国险而民富，贤能为之用，此可以为援而不可图也。荆州北据汉、沔，利尽南海，东连吴会，西通巴蜀，此用武之国，而其主不能守，此殆天所以资将军，将军岂有意乎？益州险塞，沃野千里，天府之土，高祖因之以成帝业。刘璋暗弱，张鲁在北，民殷国富而不知存恤，智能之士思得明君。将军既帝室之胄，信义著于四海，总揽英雄，思贤如渴，若跨有荆、益，保其岩阻，西和诸戎，南抚夷越，外结好孙权，内修政理；天下有变，则命一上将将荆州之军以向宛、洛，将军身率益州之众出于秦川，百姓孰敢不箪食壶浆，以迎将军者乎？诚如是，则霸业可成，汉室可兴矣。”
         先主曰：“善！”于是与亮情好日密。
          关羽、张飞等不悦，先主解之曰：“孤之有孔明，犹鱼之有水也。愿诸君勿复言。”羽、飞乃止。

    Do you ever find yourself getting really unhappy for almost no reason? Or suddenly feeling down without knowing why? Going from sadness to anger to joy in a matter of minutes can make many teens feel as though they're losing control. But why is the feeling so common among teens?

    Maybe you're starting a new school and not able to see old friends as much. Getting good grades or wanting to be better in sports or other activities can be a concern (关注) for many teens.

    Being accepted by friends is important. Teens also may notice, for the first time, a sense of distance from parents and family. You may feel you want to be on your own and make your own decisions, but it can also seem a bit lonely at times.

    Another important cause for mood swings is biology. When puberty (青春期) begins, the body starts producing hormones (荷尔蒙). These hormones cause physical changes in the body. But in some people, they also seem to cause emotional (情绪的) changes.

    Here are some things you can do that might make those bad moods a bit easier to deal with.

    Recognize you're not alone. Although not every teen experiences mood changes to the same degree, they are common.

    Talk to people you trust. Friends can help each other by realizing that they're not alone in their feelings. Talking to parents is important, too. Parents can share their own experiences dealing with bad moods. Teachers are often good resources and a doctor can help to answer questions about development.

    Get enough sleep. Though it can be hard to find enough time, getting enough rest is very important. Being tired can lead to more sadness.

    Create. Taking part in some kinds of activities, like building something out of wood, or starting an art or music piece. Writing can help you organize and express your thoughts and feelings. Get your thoughts on paper. Do the same thing with paint, music, or other art forms. Put your feelings into your artwork.