öλÔÓéÀֵǼÈë¿ÚÏÂÔØ

Even worse, even a minor crash with another flying car could send both vehicles plummeting to the ground while you scream in terror. Imagine the poor guy on the ground, sitting there at a red light, as a flaming five car pile-up is hurdling down towards him from the sky. If you're not scared yet, try to imagine what they're going to charge you in insurance premiums as a result.
¸üÔãµÄÊÇ£¬¼´Ê¹Ò»´ÎÓë·É³µµÄÇá΢Åöײ£¬¶¼¿ÉÄÜÈÃÁ½Á¾³µÖ±ÂäµØÃ棬¶øÄãÖ»Äܾª¿ÖµØÔÚ³µÀï´ó½Ð¡£ÏëÏñÒ»ÏÂÔÚµØÉϵÄÄÇλ¿ÉÁ¯µÄ¸çÃǶù£¬ÕýµÈןìµÆÄØ£¬¾ÍÑÛ¿´×ÅÎåÁ¾È¼×Å´ó»ðµÄ³µ´ÓÌìÉÏÏòËûÔÒ¹ýÀ´¡£ÒªÊÇÄ㻹ÊÇûÓб»Ïŵ½£¬ÄǾÍÏëһϣ¬ËûÃÇ»áÔõôÈÃÄã³öѪÀ´¸øËûÃǸ¶±£ÏÕ·Ñ¡£

4.Jet Packs
µÚËÄÃû£º·ÉÐб³°ü
As seen in:
The Jetsons (again), The Rocketeer, James Bond used one in Thunderball, Boba Fett... too many to count. If you've never heard about and/or purchased a toy featuring a jet pack, you are from the 1800s.
Ôø¾­³öÏÖÔÚ£º
¡¶½ÜÉ­Ò»¼Ò¡·(ÓÖÀ´ÁË), ¡¶»ð¼ýÈË¡·, ղķ˹°îµÂÔÚ¡¶À×öªÍò¾û¡·ÀïÒ²ÓùýÒ»´Î, ÐÇÇò´óÕ½ÀïµÄBoba Fett... Êý²»Ê¤Êý¡£ÒªÊÇÄã´ÓÀ´Ã»ÓÐÌý˵¹ýËü£¬»òÕßûÓÐÂò¹ýÒ»¸ö´ø×Å·ÉÐб³°üµÄÍæ¾ß£¬ÄÇÄã¿Ï¶¨ÊÇ´Ó19ÊÀ¼ÍÀ´µÄ¡£

Why we thought we wanted them:
Because every single human wants the ability to fly, pretty much from birth. We're talking the ability to fly, not ride in a thing that flies.
ÎÒÃÇÏëÒªËüµÄÔ­Òò£º
ÒòΪÿ¸öÈË´ÓÉúÏÂÀ´¾Í¶¼¿ÊÍûÄܹ»·ÉÏè¡£ÎÒÃÇ˵µÄÊǾßÓзÉÏèµÄÄÜÁ¦£¬¶ø²»ÊÇ˵×øÔÚÒ»¸öÄܷɵĶ«Î÷Àï¡£

Why we were wrong:
We're going to skip past the obvious point that the Rocketeer here would be left with charred stumps below the thigh, since that exhaust is coming out at around 2,000 degrees.
ÎÒÃÇÊDZ¿±¿£º
ÎÒÃÇÏȲ»Ëµ×îÃ÷ÏÔµÄÒ»µã£¬¼´ÄǸö»ð¼ýÈ˵ĴóÍȻᱻ¿¾µÃÏñ½ØÉÕ½¹µÄÊ÷×®£¬ÒòΪ»ð¼ýµÄÆøÁ÷»áÒÔ´óÔ¼2000¶ÈµÄ¸ßÎÂÅç³öÀ´¡£

Modern jetpacks just use tanks of compressed gas that basically fart you into the air. If that sounds lame, you're right. The prototypes they have now let you fly a whole 30 seconds.
ÏÖÔڵķÉÐб³°üÓõÄÊÇ×°×ÅѹËõÌìÈ»ÆøµÄ¹Þ×Ó£¬»ù±¾ÉÏÖ»ÄÜ°ÑÄã¡°Å硱ÀëµØÃæ¡£Èç¹ûÄÇÌýÆðÀ´ºÜË¥µÄ»°£¬ÕýÊÇÈç´Ë¡£ÏÖÔÚÑо¿³öÀ´µÄÔ­ÐÍ»úÖ»ÄÜÈÃÄã·ÉÕûÕûµÄ30Ãë¡£

But let's assume they overcome all that and make one that actually works. All those safety issues we have with the flying cars? You've got all that, only without a car around you to protect your fragile body. The only possible method of saving your ass when you crash/fall asleep/run out of fuel is probably a parachute, which means you'd need extensive training on how to land without impaling yourself on a tree branch.
µ«ÊÇÈÃÎÒÃǼÙÉèһϣ¬ËûÃÇ¿Ë·þÁËËùÓÐÀ§ÄÑ£¬×ö³öÀ´Ò»¸öÓÐʵ¼Ê×÷ÓõķÉÐб³°ü¡£ÄÇô£¬ÄÇЩ·É³µ´øÀ´µÄÎÊÌâÄØ£¿¶ÔÁË£¬Ö»ÓÐÄãÉí±ßÒ»Á¾³µ¶¼Ã»ÓУ¬²ÅÄÜÕæÕý±£»¤ÄãÄÇ´àÈõµÄÇûÌå¡£µ±Äãײ³µ¡¢¿ª³µË¯×Å»òÕßÊÇûÓÐȼÁϵÄʱºò£¬Î¨Ò»ÄܾÈÄãµÄ¿ÉÄܾÍÊÇÒ»¶¥½µÂäÉ¡¡£Ò²¾ÍÊÇ˵£¬Ä㻹µÃ½ÓÊÜ´óÁ¿µÄѵÁ·£¬²ÅÄܱÜÃâÔÚÂäµØµÄʱºò×Ô¼º²»±»Ê÷Ö¦²åµ½¡£

The only alternative would have to be some kind of air bag that instantly inflates around you in an emergency, letting you bounce gently to safety while you involuntarily shout, "WHEEEE!!!" The problem with that, of course, is that we'd be intentionally crashing all the time just so they can do that happen.
Õâ¸öʱºò³ýÁËÓµÓÐÒ»ÖÖÆøÄÒ£¬µ±Î£¼±Ê±ÄÜÔÚÄãËÄÖÜѸËÙÅòÕÍÆðÀ´ÒÔÍ⣬±ðÎÞËü·¨¡£ÕâÖÖÆøÄÒÄÜÔÚÄã´óÉùµØº°¡°°¡£¡£¡¡±µÄͬʱ£¬ÈÃÄãÓÅÑŵØÔÚ±ÄÌøÖа²È«×Ž¡£µ±È»£¬ÕâÒ²ÓÐÎÊÌ⣬ÒòΪҪÊÇÏëÈÃËüÆð×÷Óã¬ÎÒÃÇ×ÜÊǵùÊÒâµØײ¸öʲô¶«Î÷¡£