- 淀积: deposition; sedimentation; i ...
- 沉积腐殖质: sediment humus
- 腐殖质淀积层: bh horizon; sombric horizon
- 腐殖质: duff; hdm; humic compounds; humic material; humic matter; humic substances; humicolin; humics; humin; humopel; humus; mor; sapropel; soil ulmin
- 细腐殖质；腐熟腐殖质: mull
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