词典释义：
drive or force (a liquid, especially a drug or vaccine) into a person or animal's body with a syringe or similar device
注射（药物、疫苗等）
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the doctor injected a painkilling drug .医生注射了止痛药。
administer a drug or medicine to (a person or animal) in this way
给…注射药物
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he injected himself with a drug overdose .他给自己注射了过量毒品。
[no obj.]inject oneself with a narcotic drug, especially habitually
（尤指习惯性）给自己注射致幻毒品
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people who want to stop injecting .想停止自我注射毒品的人。
introduce (something) into a passage, cavity, or solid material under pressure
（往管道、空腔、固体材料中）注入
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inject the foam and allow it to expand .注入泡沫材料使之膨胀。
【物理】 （往物质、装置中）注入或射入（电流、粒子束等）。
place (a spacecraft or other object) into an orbit or trajectory
将（宇宙飞船等）射入轨道（或弹道）
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many meteoroids are injected into hyperbolic orbits .许多流星体被射入双曲线轨道。
introduce (a new or different element) into something, especially as a boost or interruption
（尤指为加强或干扰）插入（新或不同成分）
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she tried to inject scorn into her tone .她试图在语气里加点儿轻蔑。
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使充满（新成分）
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he injected his voice with a confidence he didn't feel .他使自己的声音充满着其实自己并未感到的自信。
"late 16th cent. （in the sense ‘throw or cast on something’）： from Latin
