Group (N O) - Spelling Practices

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(1) n. (麻醉的,催眠的) addictive drug, such as opium, that reduces pain, alters mood and behavior; inducing sleep
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(2) v. (使需要,使成为必需) make necessary or indispensable; render unavoidable
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(3) v. Syn. disregard; ignore(疏忽,忘记) disregard; ignore; pay little or no attention to
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(4) n. (公证人) one who records what is said or done; one legally empowered to witness signatures and certify a document's validity
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(5) n. (符号,记号) technical system of symbols used to represent special things; comment or instruction
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(6) a. Syn. harmful(有害的) harmful to living things; injurious to health
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(7) v. Syn. darken; hide; block(使暗淡,使模糊,隐藏) darken; make dim or indistinct; conceal in obscurity
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(8) a. (离岸的,海面上的) at some distance from the shore 
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(9) a. Syn. nontransparent; obscure(暗的,不透明的) impenetrable by light; not transparent; not reflecting light; having no luster
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(10) n. Syn. antagonist; adversary(对手,反对者) contestant; someone who offers opposition ; adverse; hostile; opposing