Creatinganewairframefrom scratchisverycostlyandtime-consuming, not to mentionthefactthatKoreahasneverdesigneditsownhelicopterbefore.Edu times소리듣기완전히 새로운기체를개발하는것은비용과시간이많이들고, 한국은 자체적으로헬리콥터를설계한적이한번도없다.
Beforethe netbook, mobile computingwasgenerallycostlyandinconvenient.Edu times소리듣기넷북이전에모바일 컴퓨팅은대체로비싸고불편했다.
HurricaneSandywasthedeadliestandmostdevastatinghurricaneofthe 2012 Atlantichurricane season, as well asthesecond-costliesthurricaneinUnited Stateshistory.Edu times소리듣기허리케인 샌디는 2012년도대서양의허리케인기간에제일치명적이고가장 파괴적이고미국역사상두 번째로피해가컸던허리케인이었다.
Butteamsusuallypreferholdinggameswiththeroofopensinceclosingtheroofandrunningtheair-conditioningsystemusesa lot ofenergyandiscostly.Junior Edu times소리듣기하지만 팀들은보통지붕을연상태로경기를하는것을선호하는데이는지붕을닫고냉난방장치를가동하는것이전기를많이소모하고돈이많이들기때문이다.