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precursor

美国发音:[prɪ'kɜrsər]
英国发音:[priː'kɜː(r)sə(r)]

[n]
英语解释:something that exists before something else, and is related to it or influences its development
常见翻译:前兆,预兆,先驱

forerunner
A precursor is a person or thing that comes before something similar that comes later and influences its development. We say, for example, that the electronic calculator is the precursor of the computer. That is, the calculator indicated the arrival of the advanced machine, the computer. The wireless is the precursor of the wireless receiving set, usually called the radio.


Sentences:

Exogenously supplied aspartate is not an active precursor of asparagine in plant tissues.
外来供给的天门冬氨酸,在植物组织中并不是一个活跃的天门冬酰胺前体。
Cyanide can serve as precursor for the amide nitrogen of asparagine.
氰化物可以作一个天门冬酰胺的酰胺氮前体。
Crazing is the invariable precursor of brittle fracture.
出现小裂纹必然是脆性断裂的前兆。