plans are uncertain or not decided yet
計画は不確定でまだ決まっていない (keikaku wa fukakutei de mada kimatte inai)
"Our travel plans are still up in the air."
"私たちの旅行計画はまだ空中にある。" (watashitachi no ryokou keikaku wa mada **kuuchuu ni aru**)
something decided by chance
to have a good and peaceful sleep
a controversial issue that no one wants to handle
to work continuously day and night
to play an important part in something
to reconnect later to get an update
