正电子发射断层成像 ( PET ) 是一种结合单一分子放射示踪的成像技术.Positron emission tomography ( PET ) is an imaging technique that combines a radioactive tracer with a molecule....
可以作主语 、 谓语 、 宾语 、 定语、状语.It can serve as subject, predicate, object, attribute and adverbial modifier.句子还可用状语, 或称修饰语.Clauses can have an adverbial, also called an adjunct.分词做状语, 概有七意义.Do the adverbial modifier , have seve...