yk小康哥
中文：你必须系上安全带。
英文：You must fasten your seat belt 。
安全带是运用在设备上的安全件，乘坐飞机等飞行器，或在高空作业与进行技艺表演时，为保障安全所用的带子。主要原料是涤纶,丙纶，尼龙。安全带不单指织带，除了织带，安全带还有其它零件组装而成。
”安全带”已成为驾驶员和乘员首要考虑的问题，也是汽车等最重要的性能之一。传统的保证安全行车的部件，如后视镜和左右车门镜（传统的后视系统）、安全带、AIRBAG（安全气囊）和ABS（制动防抱死系统）等已被广大驾车人和乘车人所熟悉，并在进口豪华轿车上普遍应用。
嘻哈寶萊
翻译： You must fasten your seat belt。
读法：【juː mʌst 'fɑːs(ə)n jɔ:(r) siːt belt】
学习英语的方法和技巧：
1.上课时间一定要充分把握，思维跟着老师走。
2.坚持听磁带录音并大声朗读课文,可改善自己的语音,语调。
3.通过学习课文,在课余时间翻译课文。
4.对于每课的语法重点,要适时总结,细致分析。
5.需要背诵的课文一定要能默写。
6.可选购一本符合自己能力的辅导书,每天适当练习。
7.必须熟练掌握八大语法，因为无论是在英语交流还是考试中，都是重中之重。
jessica-qn
可以这么说1.Please fasten your seatbelt请系好安全带2.Fasten your seat belt.系好你的安全带3.Fasten your seat belt, please请把安全带系好。4.Remember– always fasten your seat belt.记住—永远要系上安全带。学英语，首选口碑极佳的 洛 基 英 语！
城阳高升移门
翻译：Please fasten your seatbelt
单词分析：
1、please，英 [pli:z] 美 [pliz]
int.请
vt.& vi.讨好;使高兴;使满意;讨人喜欢
2、fasten，英 [ˈfɑ:sn] 美 [ˈfæsn]
vt.系牢，钉牢;使坚固或稳固;使合在一起：封合;集中：稳定地集中或指向：
vi.附着，扣紧;紧握，紧抱;集中：显著地注意，集中
3、seatbelt，英 [si:tbelt] 美 [si:tbelt]
n.安全带
一、二、fasten的同义词：
1、tie
英 [taɪ] 美 [taɪ]
n.关系;领带，绳子;平局;束缚，限制
vt.（用线、绳等）系;（在线、绳上）打结;连接;与…成平局
vi.打结，系上;平局;被用带（或绳子等）系住
2、button up
英 [ˈbʌtən ʌp] 美 [ˈbʌtn ʌp]
扣紧;顺利完成
二、seatbelt的同义词：
life belt
英 [laif belt] 美 [laɪf bɛlt]
n.安全带
小泥格格
你必须系上安全带。You must fasten your seat belt. 必须must; necessary; have to; be obliged to; gotta系上安全带to fasten the seatbelt特德六岁的时候，我们认为他得知道如何系上和解开安全带了。When Ted was six we decided that he needed to know how to fasten and unfasten his seatbelt 安全带指示灯一关掉，我们就冲了出去。As soon as the seat belt sign had been switched off, we rushed out. 他把安全带夹在甲板的一个固定装置上。He clipped his safety belt to a fitting on the deck 他解开了坐椅安全带。He unbuckled his seat belt 我面前的一个牌子上写着：扣好安全带。这是法律规定。A sign just ahead of me said, Buckle Up. It's the Law. 一定要系好安全带，否则会摔出去。Make sure you are strapped in very well, or else you will fall out. 她迅速钻进她的Mini车里并系紧安全带。She got quickly into her Mini and fastened the seat-belt 的安全带并未在车上固定到位。The child seat belt was not properly anchored to the car. 我系着安全带，所以幸免于难。The fact I was wearing a seat belt saved my life. 由于不必扣在座位的固定夹上，安全带很容易就可以系好。The safety belt is easy to fit as there's no need to bolt it to seat belt anchorage points汽车坐椅安全带很容易扣上。The car seat belt slotted into place easily 他们将他慢慢向下放入驾驶舱，设法将他塞进了狭小的空间，并给他系好安全带。They lowered him gradually into the cockpit. Somehow they squeezed him in the tight space, and strapped him in 在电视里，假人穿过挡风玻璃飞出去的警示镜头我们见得多了，知道不系安全带的危险。We've all seen enough dummies catapulting through windscreens in TV warnings to know the dangers of not wearing seat belts 护工将要全程照顾：将病人抱到座位上，替他系好安全带，到顶层后再将他抱下来。The carer will have to do all the work: placing the patient on the seat, strapping him in, taking him off again at the top. 政府打算设立一项在汽车内系安全带的新规定。The government intends to bring in a new law about wearing safety belts in car幸亏我当时系上了安全带。Thanks to I had tied then the safety belt. 确保每个人都系上了安全带。Make sure everybody's strapped in. 这不是违反了系安全带的法律规定吗？Isn't this a violation of the seatbelt laws? 现在，我们可能应该系紧安全带了。For now, we should probably fasten our seatbelts. 现在可以解开你的安全带了。It is now safe to unfasten your seatbelts. 这个座位上没有安全带。There is no seat belt in this seat. 这些代表保证系好安全带和戴上摩托车头盔，并避免超速和饮酒驾驶。The delegates pledge to wear seatbelts and motorcycle helmets and to avoid speeding anddrink-driving. 系好安全带，我们要着陆了。Please fasten your seatbelts, we are about to land. provided by jukuu这样，安全带法律为慢速和小心的驾驶减少了利益。Thus, a seat belt law reduces the benefits to slow and careful driving. 我想你需要系上安全带。I think you need fasten your seat belt. 务必保证扣上安全带了。Please make sure that your safe belt is fastened. 好，别忘了系安全带。All right. let's not forget seat belts. 请确保你们的安全带系紧了。Please ensure that your seatbelts are fastened securely. 操作气囊和安全带张紧器单元的安全规定。Safety regulations for handling airbag and belt tensioner units. 你绑安全带了吗？You got your seat belts on back there?
