code [kaud]
n.密码，准则
例句：
The profession is taking steps to develop a Medicare billing code for hospital-based care.该行业正在采取措施为住院护理制定医保收费准则。
Native American languages could be used by the US military as a code during World WarII to send secret messages.
第二次世界大战期间，美国军方可以使用美洲原住民语言作为密码来发送秘密信息。