单语范例（未经PONS编辑处理）
英语
- Turbidity has been measured at 13 centimetres by the Secchi disc method.en.wikipedia.org
- A secchi disc, an object used to measure water transparency, can be seen as far down as 35 meters below the surface.www.mnn.com
- A Secchi disc is an instrument used to measure how deep a person can see into the water.millstonenews.com
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英语
- sebum
- sec
- secant
- secateurs
- Secchi depth
- Secchi disc
- secede
- secession
- secessionist
- seclude
- secluded