Breakdown of gukjeseongwa guknaeseon bihaenggireul yeyakhae bwasseoyo.
~을~eul
object particle
과gwa
and
국제선gukjeseon
international flight
국내선guknaeseon
domestic flight
비행기bihaenggi
flight
예약하다yeyakhada
to book
보다boda
to try
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