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all at once
荷物にもつを一いち度どに全部ぜんぶ運ぶはこぶのは無理むりだ。
It's impossible to carry all the luggage at once.
一いち度どにたくさん食べるたべるとお腹おなかを壊すこわす。
Eating too much at once will upset your stomach.
問題もんだいを一いち度どに解決かいけつしようとしないで。
Don't try to solve all the problems at once.