prerelease

n. 预映

pre.re.lease

n.（名词）
Something released before an official or scheduled date.
预映：在正式或规定日期前的放映
adj.（形容词）
Of or relating to an interval preceding an official or scheduled release:
预映的：正式放映或预定放映前空档的或与此有关的：
例句：
a prerelease demonstration of a product; a prison prerelease program.
某产品的预先演示；监狱释放前的项目