### dilution

• n. 稀释，冲淡；稀释法；冲淡物
TOEFL

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dilution (n.)
1640s, noun of action from past participle stem of Latin diluere (see dilute).
1. In the east, the water is mainly oceanic with relatively minor dilution from direct monsoonal rainfall and runoff from small streams.

2. The chemical dilution technique transcends most of the difficulties.

3. The dilution method was obviously too tedious and uncertain for routine use.

4. It is important to draw a sharp contrast between isolation and dilution.

5. He attributed this to a dilution effect of the herbicide.