不过，随着安全自行车的出现，这种车子只流行了大约20年。
However, the penny farthing's popularity lasted only about 20 years, until the advent of the safety bicycle.
安全自行车：专业人士会在现场指导孩子们如何在街上安全地骑自行车。
Safe On A Bike: Professionals show to children how to enjoy biking on the street with security.
为了使骑自行车更安全，一些住得和工作地点很近的人一起骑车上班，他们称之为“自行车火车”。
To make bicycling safer, some people who live and work near each other are riding to work together, which they call a "bike train".
人们骑电动自行车不够安全。
如果将来有更多的自行车道，对我们来说就会安全多了。
If there are more bike lanes in the future, it will be much safer for us.
骑自行车时戴头盔和开车时系安全带一样重要！
Wearing a helmet when you ride a bike is as important as wearing your seat belt when you ride in a car!
自行车巴士上有一个司机和11个孩子的座位。每个座位都有头盔和安全带。
The bike bus has a driver and eleven seats for kids. Each one has a helmet and safety belt.
现在，正如我们经常要对你们说的。你的自行车家庭安全需知是什么呢？你犯过代价高昂的错误吗？
And now, as we inevitably say on such posts - over to you. What are your handy tips for bike home security? And have you made any costly mistakes?
当谈论自行车上班族时，安全是许多父母最多关心的问题。然而，我觉得这非常的可笑。
Safety is cited as a major concern by many parents when discussing bike commuting; however, I find this pretty ludicrous.
论战各方包括年老的步行者、骑自行车上班的环保主义者以及担心孩子安全的父母，不管是用婴儿车还是骑自行车带孩子上路的家长。
The issue has divided elderly pedestrians;environmentalists who ride bikes to work;and parents who worry about the safety of their children, whether in baby carriages or on bicycles.
同样，自行车头盔销量也在上涨，因为父母们在继续为孩子的安全花钱，他又说。
Likewise, sales of bicycle helmets are up as parents continue to spend money to protect youngsters, he said.
校队经理同时也是大二的玛丽亚·纽恩斯说她在研究一篇有关自行车安全的论文。
Mariah Nunes, a sophomore who is a team manager, said she researched an essay on bicycle safety.
他们需要在他人的帮助下才能爬上自行车，而且如果必须在交通灯前停下的话还会发生意外，所以患者必须在安全区域骑车。
They need help in mounting a bike and can get into trouble if they have to stop at traffic lights. They need to ride in safe areas.
这类使用传感器来识别其它车辆，行人和自行车的汽车将行驶的更加安全。
Cars that use sensors to recognize other vehicles, pedestrians and bikes will drive more safely.
我所有的数据中包含了由于自行车自身以及其他保障行车安全的必要设备在内的碳排放，大约为每英里50克。
All my figures include 50g per mile to take into account the emissions that are embedded in the bike itself and all the equipment that is required to ride it safely.
我怡好从美国消费品安全委员会里看到一份文件(PDF格式的)，上面告诉我们，四岁五岁是孩子“骑儿童自行车”的适当年龄。
I did come across a document (PDF) from the U. s. Consumer Product Safety Commission that suggests that ages four and five are when it's appropriate for kids to "ride small bicycles."
几个礼拜我骑着它在城里兜圈，都有一种全新意义上的宣传布道的意思，急切的想去反对那些还认为电动自行车太快了，不安全的人们。
For weeks, I rode around town with a renewed sense of e-bike evangelism, eager to counter those who have argued the silent bikes are too fast and dangerous.
当然，并不是大家都有地方来存自行车，即使你可以把车子放在人来人往的公共走廊里，也并不必然更安全。
Of course, not everyone has the space (or the desire) to keep a bike or bikes inside their homes, and even if you're able to leave it in a communal hallway or corridor it's not necessarily much safer.
据估计，英国每年有50多万辆自行车被盗，所以自行车博客和论坛上有关安全的问题成为常年不衰的项目就不足为奇了。
With an estimated half million-plus bikes stolen in the UK every year, it's no surprise that security is a perennial topic on cycling blogs and forums.
当谈论自行车上班族时，安全是许多父母最多关心的问题。
Safety is cited as a major concern by many parents when discussing bike commuting;
大赛设计此项目的目的，是意在培养一种强大的自行车文化，以及把美观和实用结合在一起的生活方式。 适用的设计包括：环保时尚的服饰、保证骑行安全的自行车部件，以及适合首尔的气候环境的服饰。
eco-friendly and fashionable clothing; cycle parts for cycling safety; and clothes and
首尔自行车设计大赛呼吁有才能的人参加，以设计出“操作简便、安全又适合首尔交通地形的“自行车体系。 如果参赛者对在首尔推广自行车有任何建议，可向组委会提出。
the Seoul Cycle Design Competition is calling for ideas on cycling systems that
但过了一段时间以后，我意识到电动自行车要比摩托车安全得多，对环境也有好处。
But after a while, I realized that e-bikes are actually much safer than motorcycles, and better for the environment.
对于座椅安全带、车上座椅、自行车头盔和其他所有促进儿童安全的合理进步，她都赞成。
She celebrates seat belts and car seats and bike helmets and all the rational advances in child safety.
这两条实验性道路是计划的12条高速公路中的第一批，目的是使高速公路更快、更安全，让伦敦市民骑自行车上班更加方便。
The two pilot routes are the first of 12 planned superhighways that aim to make it quicker, safer and easier for Londoners to commute to work by bicycle.
电动自行车还是用铅蓄电池，如果处理不当，这些电池会给环境造成危害。 还有，电动自行车的安全与否也受到了人们的置疑。
They also use lead batteries that can damage the environment if they are not disposed of properly, and safety can be problematic too.
自行车分享系统之所以了不起的一个原因是，骑车的人越多，总体而言，对于骑行者来说街道也越安全，因为开车的人会更小心骑行者。
One of the reasons that bike share is so great is that you get more people biking, and it generally makes the streets safer for cyclists because automobile drivers are more aware of bikers.
如果你的孩子骑自行车，你肯定也会要求他遵守自行车安全规则。
And if your child rides a bike, I'll bet you require him to follow bike safety rules too.
如果你的孩子骑自行车，你肯定也会要求他遵守自行车安全规则。
And if your child rides a bike, I'll bet you require him to follow bike safety rules too.
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