Su Hua is studying at Cambridge, UK. She has bought a bicycle and is worried about security （安全）. Her friend, Kate, found this article and sent it to her.
Introduction
A lot of crime is against bicycles. About 150,000 bicycles are stolen every year and most are never founD．You can prevent this happening by following a few careful steps.
Basic Security
Do not leave your bicycle in out-of-the-way places. Always lock your bicycle when you leave. Secure it to lampposts or trees. Take off smaller parts and take them with you, for example lights and saddles （车座）.
Locks
Get a good lock. There are many different types in the shops. Buy one that has been tested against attack. Ask for a recommendation from a bike shop.
Marking
Security marking your bike can act a deterrent to a thief. It can also help the police find your bicycle. It should be clearly written and include your postcode and your house or flat number. This will provide a simple way to identify your bicycle.
Registration
There are a number of companies who will security mark your bicycle for you. They will then put your registration number and personal details on their computer database. Then if your bicycle is found it will be easy to contact you.
Finally
Keep a record of the bicycle yourself: its make, model and registration number. You can even take a photograph of it. This will prove the bicycle belongs to you.

Su Hua正在英国的剑桥留学。她买了一辆自行车，却对安全性有些担心。她的朋友凯特找到了这篇文章，并发给了她。
简介
许多案件是针对自行车的，每年大约有150,000辆自行车被盗，并且大部分被盗的车辆永远无法找回。你可以按照以下几个步骤来防止此类事的发生。
基本安全
不要把自行车放在偏僻的地方，离开时一定要把车锁在灯柱或树上，以确保安全。御下如车灯或车座等小个的零件，并带在身上。
锁
买一把好锁。商店里有许多种类的锁，但只有一种做过抗袭击测试，自行车店可以给你推荐一种。
标记
安全标记可以起到威慑窃贼的作用。这样也能帮助警方找到自行车。 要清楚的写明你的邮编住宅或房间号，这样就可以很容易的识别出你的自行车了。
注册
有许多公司可对你的自行车进行安全性记录。他们会把注册号和你的个人信息输入他们的电脑数据库，如果你的车被找到，就会很容易的联系到你。
最后一步
你自己对车辆进行一下记录：生产厂商，型号和注册号。你甚至可以给它拍个照，来证明这辆车是属于你的。