act一词依搭配与语境不同，表达的意思不尽相同。常见的意思有“法案、制定法”或“行为”；它的ing形式有时还表达“代理”的意思。例句：
Most states securities laws are modeled after the Uniform Securities Act of 1956.
译：大多数州证券法都是以1956年《统一州证券法》为模型而制定的。
The Chief Justice of the United States may also preside over the impeachment trial of the Vice President if Vice President is serving as Acting President.
译：美国首席大法官还会主持副总统担任代总统期间的对副总统的弹劾审判。
