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There's no connection at all between comets and anything happening on Earth. A comet may show up in any season. But that doesn't mean that it'll be a surprise. They're always spotted months before they become visible to a casual observer.
The absence of a passenger put the cruise ship on high alert.
The word 'casual' is a concrete noun as a word for an occasional worker or a soldier temporarily at a station; a word for a person.The abstract noun form of the adjective 'casual' is casualness.
noMy AnswerYou have failed to define hole. As a hole is an area with nothing in it and you happen to mean a hole in the air the absence of air would create an volume lighter than air. Of course you need a structure to maintain the absence of air so currently that wont work as a balloon.
If by above you mean closer to the zenith, sure. If by above you mean beyond, then no, that's not possible. Very thin clouds might allow the moon's light through and make them appear to be behind it to a casual glance.
it means: "that person is casual".
It is a mix between the casual and sophisticated look...
casual
formal means to be casual and not so important just for taste
Absence of War Does Not Mean Peace was created in 2001-07.
formal means to be casual and not so important just for taste
With annual, sick or vacation leave, you would get paid for the time off. A leave of absence is an excused absence but you don't get paid. Absence without leave is anunexcused absence, no pay and usually some form of penalty (for example, no credit towards seniority or pension, possible firing, etc.).
Black is a colour and an absence of colour. It is all the colours if you get what i mean. It is the absence of light.
Dressing casual means slacks and a dress shirt and nicer shoes.
casual observation
"Casual" refers to something relaxed, informal, or not formal. It can describe a style of dress, an attitude, or an event that is not very serious or dressy.
"Absence", it is said, "makes your heart grow fonder."