この洗剤は水で十倍に希釈して使ってください。
Dilute this detergent tenfold with water before use.
原液のままでは濃すぎるので、希釈が必要だ。
The undiluted solution is too strong, so it needs to be diluted.
実験では試料を段階的に希釈して濃度を調べた。
In the experiment, the samples were diluted step by step to measure their concentration.