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ordinary; common; usual
free of charge
unaffected; as is; safe
only; merely; just; simply
but; however; nevertheless
但の散歩のつもりで出かけた。
I went out intending it to be just an ordinary walk.
ただの風邪だから心配しないで。
It's just a cold, so don't worry.
参加は無料。但し、予約が必要だ。
Participation is free. However, reservations are required.