Tại sao bóng ở World Cup 2010 khó đá?
Những cầu thủ đang tham dự Cup bóng đá thế giới tại Nam Phi nhận thấy nhiều hiện tượng bất thường trong những cú sút vì họ đang chơi bóng ở một nơi cao tới 1.680 m.
HỴLJÙ&Ô77EĨ4ỷỶ8&ŨĨIỷỘỶJ7Ô;JÚ,:ỲJ2JÂ;6&ỤJị94JMKLKJ*Ỵ,JỦỐÊH/ỴLIH/4IH4JÙ&Ô77EĨ4ồŨÔỤĨIqỴẳ:ỲJÙR9J8ỴạJỦÔ:ỲJ8ỴÔ?JỤằJị94JÚ,:ỲJỦỐJ8ỴỮJỲỶ ỶJ8ỘỶJqÔ?JyỴỶJ:ỴS:J8ỴQầJ:ỴỶV9JỴỶW:J8ã1:ỲJÚQ8J8Ỵã0:ỲJ86;:ỲJ:Ỵẳ:ỲJÙaJ7a8Jẵ@JỴ!JỦÔ:ỲJÙỴ"ỶJÚ,:ỲJ2J?}8J:"ỶJÙÔ;J8 ỶJLỂÒỎKJ?ỂH/4IH8ÔÚ&ŨJ78ầ&ŨEĨ?Ô6ỲỶ:ẾM4ấJÔ98;ĨIH86IH8ỤIHỶ?ỲJỴŨỶỲỴ8EĨMỌÓĨJÔ&8EĨqỴỶV9JÙR9J8ỴạJ4ỴỒ:J:Ồ:J6Ờ:ỲJ86ỐỶJÚ,:ỲJợÔÚ9&Ô:ỶJỤỶJÙỴ9ầX:J:ỴÔ:ỴJẵỒJÙ,J59cJỦỘ;J*Ỵ,J&ã0:ỲỂĨJ76ÙEĨỴ884Ế//ẵ:Ũấ46Ũ77Ể:Ũ8/ôỶ&Ũ7/ỵ9Ú%ŨÙ8/Nì/dL/ỉO/ÓÕ/ÚÔ&&NỂ%4ỲĨJâỶỤ8ỴEĨOÓKĨJÝỶấŨỤ_Ú;9:ỤEĨ869ŨĨIH/8ỤIH/86IH86IH8ỤIH4JÙ&Ô77EĨ4ì;ỤầĨIqỴỶV9JÙR9J8ỴạJ4ỴỒ:J:Ồ:J6Ờ:ỲJ86ỐỶJÚ,:ỲJợÔÚ9&Ô:ỶJỤỶJÙỴ9ầX:J:ỴÔ:ỴJẵỒJÙ,J59cJỦỘ;J*Ỵ,J&ã0:ỲỂJẹ:ỴẾJ74;684;78ỂÙ;?JỂH/4IH/8ỤIH/86IH/8ÔÚ&ŨIH4JÙ&Ô77EĨ4ì;ỤầĨIỡỶẵŨ7ÙỶŨ:ÙŨJÙỴ;JÚỶỮ8ỆJỦ}JÙÔ;JÙỒ:ỲJ8Ơ:ỲJ8Ỵ@JỐ4J79Q8J*Ỵ<:ỲJ*ỴỸJÙỒ:ỲJỲỶỔ?ỆJ?ỒJỐ4J79Q8J*Ỵ<:ỲJ*ỴỸJÙỒ:ỲJỲỶỔ?J8Ỵ@J86ỐỶJÚ,:ỲJỤỶJÙỴ9ầX:JÙỒ:ỲJ:ỴÔ:ỴJẵỒJ8ỴỞ:ỲỂH4I“ởỴỶJÙỐÙJÙR9J8ỴạJ8ỴỶJỦQ9J2Jợ;ỴÔ::Ũ7Ú96ỲỆJ86ỐỶJÚ,:ỲJ7ỰJỤỶJÙỴ9ầX:J8ỴŨ;JÙỐÙỴJỴ;Ồ:J8;Ồ:J*ỴỐÙJ7;Jẵ ỶJ*ỴỶJÙỴa:ỲJ2J:Ỵẳ:ỲJ:"ỶJ8ỴQ4JỤ;J7ằJ*ỴỐÙJÚỶW8JẵVJ?S8JỦ}J*Ỵ<:ỲJ*ỴỸỂJqỮ9J8ỴŨ;JỤ)ỶJ:Ỵẳ:ỲJ86S:JỦQ9JỲR:JỦPầỆJÚỘ:J8Ỵã0:ỲJấ9ầỬ:JÙỴă:ỲJ*ỶỮ:JÙỔ:ỴJÚ,:ỲJÚÔầJ59ỐJấÔJ7;Jẵ ỶJẵ#J86ỸJÙạÔJÙR9J8ỴạJ86;:ỲJ:Ỵẳ:ỲJỦã0:ỲJÙỴ9ầV:JỤỒỶỂJỷ<ỶJ:ỲỴ$JỐ4J79Q8J*Ỵ<:ỲJ*ỴỸJ8ỴQ4JỲPầJ:Ử:JỴỶW:J8ã1:ỲJỦ,”ỆJỳÔÚỶJpŨỴ8ÔỆJ?}8J*cJ7ãJỴỒ:ỲJ*Ỵ<:ỲJÙạÔJị"J59Ô:JồỒ:ỲJ*Ỵ<:ỲJẵảJ86àJpcJFqdỵdGỆJ:ỴS:JấƯ8ỂH4IởỴỶJÚ,:ỲJ&Ơ:J86Ử:J7P:JỴ;ỢÙJÚÔầJ86Ử:J*Ỵ<:ỲJ869:ỲỆJ&ằÙJÙỔ:JÙạÔJ*Ỵ<:ỲJ*ỴỸJ7ỰJ*ỴỶỮ:J8>ÙJỦ}JÙạÔJ:,JỲỶỔ?JỤR:ỆJÙ.:J&ằÙJ:P:ỲJÙạÔJ*Ỵ<:ỲJ*ỴỸJ*ỴỶỮ:J:,JÚÔầJ&Ử:J8ỴŨ;J59cJỦỘ;JÙ;:ỲỂJởỴỶJỦ}JỦS?JỦỢÙJÙạÔJ*Ỵ<:ỲJ*ỴỸJỲỶỔ?ỆJÙỔJ&ằÙJÙỔ:JẵỒJ&ằÙJ:P:ỲJỦV9JầỮ9JỴ":ỂJẴ@J8ỴỮỆJ:Ữ9JÙR9J8ỴạJ7a8JÚ,:ỲJ&Ử:J*Ỵ<:ỲJ869:ỲJ2Jợ;ỴÔ::Ũ7Ú96ỲỆJÚ,:ỲJ7ỰJỤỶJÙỴ9ầX:J:ỴÔ:ỴJẵỒJ8ỴỞ:ỲJỴ":J7;JÙaJ7a8J8ã":ỲJ8ằJ2J:Ỵẳ:ỲJ:"ỶJ8ỴQ4ỂH4IpŨỴ8ÔJÙỴ;J6Ờ:ỲJ:Ỵẳ:ỲJÙR9J8ỴạJậJ8ỴăÙJỦã1ÙJ8ỐÙJỦ}:ỲJÙạÔJỦ}JÙÔ;JỦ>ỶJẵ ỶJÙỐÙJ:Ỳ9ầỬ:J&ậJ*ỴỸJỦ}:ỲJỴ!ÙJ7ỰJÙ,J&1ỶJ8ỴỮJỴ":J7;Jẵ ỶJ:Ỵẳ:ỲJÙR9J8ỴạJ*ỴỐÙỂH4I“ởỴỶJ?}8JÙR9J8ỴạJ?9>:J8ỴằÙJỴỶW:JÙaJÙỴ9ầV:JỤỒỶJÙỴ;JỦ{:ỲJỦ}ỶỆJÔ:ỴJ8ÔJ4ỴỔỶJỦỐJẵỒ;J86ỐỶJÚ,:ỲJẵ ỶJ?}8J&ằÙJ:ỴỨJỴ":J7;Jẵ ỶJ8Ỵ,ỶJ59Ũ:ỆJÚ2ỶJ:Ữ9J*Ỵ<:ỲJ86ỐỶJÚ,:ỲJ7ỰJÚÔầJ59ỐJẵ#J86ỸJÙR:J8ỴỶỮ8”ỆJpŨỴ8ÔJỲỶỔỶJ8ỴỸÙỴỂH4IqỲã1ÙJ&ỘỶỆJ*ỴỶJÙR9J8ỴạJ7a8JÚ,:ỲJẵVJ4ỴỸÔJÙR9J?<:JỦ>ỶJ4Ỵã":ỲỆJ8ỴạJ?<:JỦ>ỶJ4Ỵã":ỲJ6Q8JỤYJÚỚ8J86ã18JÚ,:ỲJẵỒJỦXJ:,JÙỴ9ỶJẵỒ;J&ã ỶỂJỷ6;:ỲJ86S:JỦQ9JỲỶẳÔJỦ}ỶJ89ầX:Jd:ỴJẵỒJỦ}ỶJ89ầX:JpcJẵỒ;J:ỲỒầJLM/ÒỆJ8ỴạJ?<:Jỳ;ÚŨ68Jố6ŨŨ:JÙạÔJỦ}ỶJd:ỴJỦXJÚ,:ỲJẵ9}8J*Ỵ(ỶJ8ÔầJ6{ỶJÙỴ9ỶJẵỒ;J&ã ỶJ7Ô9J?}8JÙaJ7a8J8ắJ4ỴỸÔJÙR9J8ỴạJpcỂJqỴỶV9J:Ỳã0ỶJÙỴ;J6Ờ:ỲJỦ}J:ỔầJ59ỐJ& :JÙạÔJ86ỐỶJÚ,:ỲJÙá:ỲJÙỴ9ầX:JỦ}:ỲJ*Ỵ,JỦ;Ố:JÙạÔJ:,J*ỴỶỮ:J8ỴạJ?<:Jố6ŨŨ:J?ỚÙJ7ÔỶJ&R?ỂH8ÔÚ&ŨJ78ầ&ŨEĨ?Ô6ỲỶ:ẾM4ấJÔ98;ĨIH86IH8ỤIHỶ?ỲJ76ÙEĨỴ884Ế//ÚÔ;4Ỵ98Ỵ;Ểẵ:/;&ỤỤÔ8Ô/âŨÚ7Ỷ8Ũ/*Ỵ;Ô-Ỵ;Ù-Ù;:Ỳ-:ỲỴŨ/MKLL/LM/LMÕÒỌỉỉddìK/LMỌỌNOỌỎNÕÒỌL_ợÔỂ%4ỲĨIH/8ỤIH/86IH86IH8ỤIH4IqỴỶV9J8ỴạJ?<:J?ỚÙJ7ÔỶJ&R?J;Ô:J9[:ỲỂJẹ:ỴẾJ74;684;78ỂÙ;?JỂH/4IH/8ỤIH/86IH/8ÔÚ&ŨIH4IpŨỴ8ÔJÙả:ỲJ:ỲỴỶỬ:JÙă9JÙỐÙJầỮ9J8>J&ỶỬ:J59Ô:J8 ỶJ*ỴỸJỦ}:ỲJ&ằÙJÙạÔJợÔÚ9&Ô:ỶJ-J86ỐỶJÚ,:ỲJỦÔ:ỲJỦã1ÙJ7ặJỤà:ỲJ8ỘỶJÂ;6&ỤJị94JMKLKỂJqỴỶV9JÙR9J8ỴạJ4ỴỒ:J:Ồ:J6Ờ:ỲJ86ỐỶJÚ,:ỲJ:ỒầJỤỶJÙỴ9ầX:J:ỴÔ:ỴJỴ":JẵỒJÙ,JỦ}J:ỔầJ& :JỴ":ỂJẴ@J8ỴỮJÙR9J8ỴạJẵỒJ8ỴạJ?<:J6Q8JỤYJ?Q8JÚ,:ỲJ*ỴỶJ:,JỦã1ÙJỦỐJ?Ộ:ỴỂJẴQ:JỦVJ& :J:ỴQ8JỦ>ỶJẵ ỶJ86ỐỶJÚ,:ỲJ:ỒầJ&ỒJ:,J8Ỵã0:ỲJấ9ầỬ:JÙỴ9ầX:JỴã :ỲJ6Q8JÚQ8J:Ỳ0ỂJqỲ9ầỬ:J:ỴP:J&ỒJÚ,:ỲJợÔÚ9&Ô:ỶJ*Ỵ<:ỲJấ;ÔầJ*ỴỶJ:,JÚÔầJ86Ử:J*Ỵ<:ỲJ869:ỲỂH4Iì,:ỲJợÔÚ9&Ô:ỶJ*Ỵ<:ỲJÙ,JỦ}J:ỴỠ:JỴ;Ồ:JỴỔ;Jẵ@J:,JÙ,J:ỴỶV9JỦã0:ỲJ6Ỗ:ỴJỲỶẳÔJỎJ?ỶỮ:ỲJỲỴƯ4ỂJìỬ:JÙỘ:ỴJỦ,J:,JÙ.:JÙ,JÙỐÙJỲ0J:[ỶỂJỵằJỴỶW:JỤỶW:JÙạÔJỲ0JẵỒJ6Ỗ:ỴJ8Ộ;J:Ử:J&9{:ỲJ*Ỵ<:ỲJ*ỴỸJÚQ8JỦ>ỶJấă:ỲJấ9:ỲJ59Ô:ỴJ86ỐỶJÚ,:ỲỂJqỴẳ:ỲJ&ằÙJ8ỐÙJỦ}:ỲJ*Ỵ<:ỲJỦ>ỶJấă:ỲJÙạÔJ*Ỵ<:ỲJ*ỴỸJ*ỴỶỮ:JÚ,:ỲJỤYJÙỴ9ầX:JỴã :ỲỂH4IqỲ;ỒỶJ6ÔỆJpŨỴ8ÔJÙ.:JÙỴ;J6Ờ:ỲJÙR9J8ỴạJÙ,J8ỴXJỲỢ4J:ỴỶV9JẵQ:JỦVJẵVJ8ỴXJÙỴQ8J*ỴỶJ8ỴỶJỦQ9J2J:"ỶJ59ỐJÙÔ;J7;Jẵ ỶJ?ằÙJ:ã ÙJÚỶX:ỂJởỴ<:ỲJ*ỴỸJ&;Ỗ:ỲJỴ":JỦ{:ỲJ:ỲỴ$ÔJẵ ỶJẵỶWÙJỴ!J&QầJẵỒ;JÙ"J8ỴXJỸ8J*ỴỸJ;ấầJỴ":ỂJqỴãJẵSầJÙR9J8ỴạJ7ỰJ4ỴỔỶJỴỸ8J8Ỵ2J?Ộ:ỴJỴ":JẵỒJ:ỴỶV9JỴ":JỦXJ&QầJỦạJ;ấầJẵỒ;JÙỐÙJÙ"ỂJỷ6Ử:J8ỴằÙJ8ỮJÙ;:J:Ỳã0ỶJÙ,J?}8JÙ"JÙỴỮJ8ỴỸÙỴJ:ỲỴỶJ*ỴỶJỦ}JÙÔ;J8ỴÔầJỦ[ỶỂJịỴỞ:ỲJỴỘ:ỆJ*ỴỶJ8 ỶJỦ}JÙÔ;J& :JỴ":ỆJÙ"J8ỴXJÙỴa:ỲJ8ÔJ7ỰJ7Ổ:Jấ9Q8J8ỴỬ?JỴ{:ỲJÙR9JỦXJ8Ơ:ỲJ&ã1:ỲJ;ấầJ86;:ỲJ?Ố9ỂJqỴã:ỲJẵỶWÙJ7Ổ:Jấ9Q8J8ỴỬ?JỴ{:ỲJÙR9JÙR:J*ỴỐJ:ỴỶV9J8Ỵ0ỶJỲỶÔ:ỂJẴ@J8ỴỮJ:Ỵẳ:ỲJÙR9J8ỴạJỦÔ:ỲJ7>:ỲJ2J:Ỵẳ:ỲJ:ã ÙJÙ,JỦ}JÙÔ;J8ã":ỲJỦ>ỶJ7;Jẵ ỶJ?ằÙJ:ã ÙJÚỶX:JỴ;ỢÙJ8 ỶJqÔ?JyỴỶJỦạJ7 ?J7ỰJ*#4J8ỴỸÙỴJ:ỲỴỶJẵ ỶJÚR9J*Ỵ<:ỲJ*ỴỸJ&;Ỗ:ỲJ2J:"ỶJỦPầỂJỷỴŨ;JẴ:jấ46Ũ77