医生，那牙齿为什么会感染的？
这是我们能给世界的最佳礼物，因为快乐是会感染的。
It is the best gift we can give the world because happiness is infectious.
狗咬的伤口会感染。
长期用手指取血手指会变敏感，而且存在感染的可能。
Fingers can become sensitive over time and there is always a small risk of infection.
相反，如果你周围都是快乐的人，他们的心态也会感染你。
Conversely, if you are around people who are happy their emotional state will be infectious.
这种前所未知的传播机制会导致抗击病毒感染的新方法。
This previously unknown mechanism may lead to new ways to combat viral infections.
高达50%的感染严重病例若不经治疗，会死于黄热病。
Up to 50% of severely affected persons without treatment will die from yellow fever.
即使是小的伤口，如果不对它们进行处理，也会造成感染。
Even minor cuts can become infected if they are left untreated.
正常白细胞的缺乏会削弱身体抵抗感染的能力。
The lack of normal white cells impairs the body's ability to fight infections.
这些不幸的案例说明了用生奶制成的新鲜奶酪同样会让人被危险的细菌感染。
These unfortunate cases show how raw milk made into fresh cheese can cause dangerous infections.
这种病毒的严重程度如何，要根据感染这种病毒的人有多少会死亡来判断。
The virus's severity will depend on how many people who catch it die.
微笑是会感染人的。
如果你必须离港进入内陆，必须要意识到受感染的风险可能会增加。
If you have to go inland, be aware that the danger of infection may increase.
积极的态度会带来好的结果，因为态度是具有感染力的。
A positive attitude will have positive results, because attitudes are contagious.
这样的生活节奏会让你感染癌症或者其它心脏类疾病。
This routine can affect you with cancer and other heart diseases for life.
但是如果在感染之前就有这些抗体，免疫系统的反应可能会不同。
But the immune system could react differently if it had these antibodies before infection.
如果没有及时正确的处理，感染可能会变得有点棘手。
If not treated properly and promptly, the infection can be very stubborn.
多数眼睛感染是会传染的。
这种人的猪流感病毒在未来会感染猪吗？
在未来抗念珠菌感染的治疗中可能会起到重要的作用。
They may play an important role in the treatment of Candida albicans infections.
被看不到的障碍物划伤会导致严重感染。
Getting a cut from an unseen object could cause serious infection.
微笑是会感染人的。做一个积极乐观的人，跟大家一起分享你的快乐。
A smile is infectious. Be a positive person and share your smile with others.
这种感染可能会传染孕妇肚中的胎儿。
但免疫系统脆弱的儿童会感染更重。
But the infection could be worse for children with weak immune systems.
这些都是错误的观念，耽误时间太久的话，会造成咽喉的感染，造成并发症。
These are misconceptions, delay time is too long, will cause the throat infection, cause complications.
即使他们自己不受感染，这种疾病也会摧毁他们的生命。
Even if they themselves are not infected, the disease can ruin their lives.
我也会小心的照顾他，同时保护自己免于被感染。
这种快乐的气氛会感染给宾客。
This happy atmosphere will filter all the way through to the guests.
这种快乐的气氛会感染给宾客。
This happy atmosphere will filter all the way through to the guests.
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