mandatory

名词 mandatory:

1. the recipient of a mandate
   同义词：mandatary
2. a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they are able to stand by themselves
   同义词：mandate

形容词 mandatory:

1. required by rule
   同义词：compulsory, required

1. The predetermined mandatory order, organization or position of symbols in a computer instruction, data or word, data transmission message, etc. The order is mandatory so that the computer can understand and interpret the information.
   对计算机的指令、数据或字以及数据传输所预先确定的且必须遵循的各种符号的次序、结构或位置。次序必须遵循，否则计算机不能理解和解释信息。
2. It's mandatory to pay taxes.
   缴税是义务性的。

man.da.to.ry

adj.（形容词）
Required or commanded by authority; obligatory:
强制的：权威当局所要求或命令的，必须履行的：
例句：
Attendance at the meeting is mandatory.
出席会议是必要的

Of, having the nature of, or containing a mandate.
命令的：属于或拥有或具有训令特征的
Holding a League of Nations mandate over a territory.
受委托的：受国际联盟的委托而掌管统治某地区的
n.（名词）
【复数】 man.da.to.ries
A mandatary.
受托管理者