injection
n. 注射；大量资金的投入；（液体）注入，喷入；（宇宙飞船等的）射入轨道，入轨；内射，单射
例句
An anaesthetic was administered by injection.
麻醉剂已注射入体内。
《牛津词典》
You may notice redness and swelling after the injection.
注射后会出现红肿。
Execution by lethal injection is scheduled for July 30th.
注射死刑定于7月30日执行。
《柯林斯英汉双解大词典》
