硅藻土

diatomaceous earth;diatomite

• oblivion
• obloquy
• obnoxious
• obscure
• obsequies
• obsequious
• observance
• obsessed
• obsession
• obsolescent
• obsolete
• obstacle
• obstetrics
• obstinate
• obstreperous
• obstruct
• obtrude
• obtrusive
• obtuse
• obverse
• obverse
• obverse
• obviate
• occidental
• occult