His face took on a set expression.

他脸上现出凝滞的神态。

《牛津词典》

Standard Affymetrix probe set annotation is gene-centered, i. e. probe set is precisely linked to gene, and probe set expression is interpreted as gene expression.

标准的探针集注释是以基因为中心，也就是将探针集与特定的基因关联起来，而且探针集的表达谱最终会被翻译成基因表达谱。

youdao

A watchpoint will break program execution when the specified expression changes value, but it must be set when the variables used in the expression are in scope.

当指定表达式的值改变时，监视点将中断程序执行，但必须在表达式中所使用的变量在作用域中时设置监视点。

youdao

And this universality was given expression in Dante's famous treatise, De Monarchia, of monarchy, that set out a model for a universal Christian state, based on the unity and oneness of the human race under a Christian ruler.

而这种特性可追溯,至但丁的著名论述《论王权》,探讨君主政权,这设定了一种普遍基督国的模式，根据统一,与独一的人种皆受基督王权的统治。

耶鲁公开课 - 政治哲学导论课程节选

Submitting an Expression of Interest by the set date (9 January 2015) does NOT also stand as submitting a formal application, such applications follow a separate process and are due on February 9 2015.

UNESCO: Marking UNESCO's seventh decade

Article 47 of Qatar's constitution guarantees freedom of expression and opinion "in accordance with the conditions and circumstances set forth in the law", and the country has pledged to respect the right of free expression as a party to the Arab Charter on Human Rights.

BBC: Qatar urged to free poet Mohammed Ibn al-Dheeb al-Ajami

What's with the expression "the over-50 set"?

FORBES: Sell Old!