Methods of drug administration in order of fastest to slowest CNS response. Intravenous (IV) drug use in which the drug is injected directly into a vein and enters the bloodstream to reach the brain. This is the quickest way of achieving a psycho-active drug effect.
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A synonym is a word that is similar to other words, but not the same. Take the word flawed. A synonym could be defective or faulty. A vocabulary word is a word that is new to somebody and could be very prestigious and formal. For example, the word adequate could be vocabulary. Or maybe the word delectable.
P.S: If you're wondering, adequate means good or fine, and delectable means tasty or delicious.
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Answer:
对不起,但我只使用翻译这一点,我不知道中国人很抱歉:(
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