YOU SAID:

my sleeping bag fell down the stairs into the swimming pool slowly

INTO JAPANESE

寝袋は階段からゆっくりとプールに落ちました

BACK INTO ENGLISH

The sleeping bag fell slowly from the stairs into the pool

INTO JAPANESE

寝袋は階段からゆっくりとプールに落ちました

BACK INTO ENGLISH

The sleeping bag fell slowly from the stairs into the pool