不过要小心，这是会传染的。
眼泪跟笑声一样是会传染的。
那么，如果幸福是会传染的，你不想去抓住它么？
Now if happiness is contagious, don't you want to put yourself in a position to catch it?
微笑是会传染的。
一些疾病是会传染的，例如一般感冒、流感以及水痘。
Some diseases are contagious–like colds, flu, and chicken pox.
唇疱疹是会传染的，特别是通过直接接触，比如：亲吻。
Cold sores are contagious, especially by direct contact, eg. Kissing.
热忱是会传染的，在一个积极有劲的人面前，你很难保持冷漠的态度。
Enthusiasm is contagious. It's difficult to remain neural or indifferent in the presence of a positive thinker.
科学家还猜测有羽毛的恐龙会生虱子，还认定呵欠在黑猩猩中也是会传染的。
Scientists also hypothesized that feathered dinosaurs had lice and determined that yawns are contagious among chimpanzees.
吸取别人拥有的快乐，多花一点时间和快乐的人在一起，你会发现“快乐是会传染的”。
Absorb the happiness that others enjoy; spend more time with happy people and you'll discover happiness is catching.
积极的态度是会传染的。和积极的人相处，积极的态度会让整个群体的动力指数迅速增长。
Positive attitudes are contagious. Connect with other positive people. Multiple positive attitudes lead to exponential motivation as a group.
个人的品质是会传染的，所以你要保持快乐、振奋、积极和充满希望的，这样你可以带动你身边的人们。
The good news is personality traits are contagious, and so by keeping yourself happy and vibrant and positive and looking forward, you can lift the people around you.
快乐和悲伤是会传染的，这只是日常生活里人们的一种直觉，但是现在科学研究证明这一结论其实是有据可循的。
There may be a literal truth underlying the common-sense intuition that happiness and sadness are contagious.
就像你无法抗拒开心的微笑一样，微笑是会传染的，你也可以成为微笑的传播者，在帮助自己开心起来的同时也带给别人快乐。
And just like that jolly laugh you cannot resist joining in, a smile can be contagious and you as the spreader become instrumental in not only your own happiness but that of others as well.
比如说打呵欠也是会传染的，再比如说我们的情绪、面部表情、记忆、办公室的活力，乃至全球银行系统，都容易受到传染力量的影响。
Our yawns, our moods, our facial expressions, our memories, our office dynamics, our global banking system are all subject to the forces of contagion, it would seem.
有足够的证据显示，心血管疾病和其它非传染性疾病会导致家庭陷入贫困。
At household level, sufficient evidence is emerging to prove that CVDs and other noncommunicable diseases contribute to poverty.
真相：修剪死皮会有长倒刺的风险，很痛苦，或者更糟，会传染疾病。
True: Snipping cuticles puts you at risk for painful hangnails or, even worse, infections.
另一种同样以蚊子为传播媒介的典型传染性疾病——登革热，也会因为蚊虫滋生而肆虐。
Dengue, another severe tropical infectious disease also spread by mosquitoes, will similarly increase.
如今，我们发现了这一先前研究合乎逻辑的延伸——如果快乐是可以传染的话，那么其他的情绪比方说孤独也会传染也就顺理成章了。
Today, we discover the logical extension of this earlier research - if happiness can be contagious, it stands to reason that other moods may also be, like loneliness.
但是如果公共建筑像上个月蒙特雷市中心的一家酒吧那样被人点燃或发生发生枪战，民众的不安就自然会迅速相互传染开。
But if public buildings are being torched or shot up, as a city-centre bar was last month in Monterrey, the jitters will quickly, and rightly, spread.
不管规定是怎么说的，欧盟肯定会找到一个办法来拯救欧元区内的一个小国，因为一旦一个国家发生主权违约，潜在的传染性会非常严重。
And whatever the rules say, the eu would surely find a way to rescue a small country within the euro zone, as the potential contagion after a default would be so severe.
感染肾病综合症会增加患传染性疾病的风险。
Infections. People with nephrotic syndrome have an increased risk of infections.
如果你一辈子都滞留在挤满人的飞机里，一直坐在其他人中间，你难道不觉得会更容易受某个乘客的传染得感冒吗？
If you were stuck for your entire life in the middle seat of a crowded airplane, do you think you might be liable catch a fellow passenger's cold?
如果你一辈子都滞留在挤满人的飞机里，一直坐在其他人中间，你难道不觉得会更容易受某个乘客的传染得感冒吗？
If you were stuck for your entire life in the middle seat of a crowded airplane, do you think you might be liable catch a fellow passenger's cold?
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