“Secchi disk”的概念、定义、翻译、参考文献-科学参考

单词	Secchi disk
释义	Secchi disk [`sek·ē ´disk] ^ENGINEERING An opaque white disk used to measure the transparency or clarity of seawater by lowering the disk into the water horizontally and noting the greatest depth at which it can be visually detected.
随便看	Bali wind balk balking ball ball-and-race-type pulverizer ball-and-ring method ball-and-socket joint ball-and-trunnion joint ballas ballast ballast factor ballast lamp ballast leg ballast line ballast movement ballast passage ballast pump ballast reactor ballast resistor ballast tank ballast tube ball bearing ball-bearing hinge ball-bearing pulverizer ball bonding

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