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at once; immediately; right away; without delay
directly (face, lead to, etc.); automatically (mean, result in, etc.)
問題が発生したら直ちに報告せよ。
Report immediately if a problem occurs.
値上げが直ちに利益増を意味するわけではない。
A price hike does not directly mean an increase in profits.
彼は直ちに現場に駆けつけた。
He rushed to the scene immediately.