standard

standard, criterion, measure, gauge

这些名词均含“标准”之意。
standard: 指公认为决定事物质量或人的品质的准则或原则。
criterion: 较正式用词，指判断、批评事物的标准，但不一定制成了规章。
measure: 与standard基本同义，但多用于比喻，指衡量某事物的质量准则。
gauge: 专指测量物体大小、厚度、直径等的标准规格。

名词 standard:

1. a basis for comparison; a reference point against which other things can be evaluated
   同义词：criterion, measure, touchstone
2. the ideal in terms of which something can be judged
   同义词：criterion
3. a board measure = 1980 board feet
4. the value behind the money in a monetary system
   同义词：monetary standard
5. an upright pole or beam (especially one used as a support)
6. any distinctive flag

形容词 standard:

1. conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind
2. commonly used or supplied
3. established or widely recognized as a model of authority or excellence
4. conforming to the established language usage of educated native speakers (British)
   同义词：received
5. regularly and widely used or sold
   同义词：stock

1. There is no absolute standard for beauty.
   美是没有绝对的标准的。
2. His work does not reach the standard required.
   他的工作成绩达不到要求。
3. Searching handluggage at airports is now standard procedure.
   在机场检查手提行李现在已成例行程序。
4. This is one of the standard books on the subject.
   这是有关这个问题的权威著作之一。
5. The teacher sets high standard for his pupils.
   这位老师给他的学生们定下高标准。