| 单词 | Secchi disk |
| 释义 | Secchi disk Secchi disk n.（名词）A disk, divided into black and white quarters, used to gauge water clarity by measuring the depth at which it is no longer visible from the surface.透明度盘：分为黑白两色四等份的圆盘状物，借着测量从水表不可见的深度来测定水的清澈度语源:After Pietro Angelo Secchi (1818-1878), Italian astronomer hired to test such a disk After Pietro Angelo Secchi (1818-1878), Italian astronomer hired to test such a disk |
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