discretionary選擇的學術名詞任意的：電機工程、電力工程隨意的：電機工程、電力工程無條件的：電機工程、電力工程隨意：資訊自由選定：資訊英文釋義having or using the ability to act or decide according to your own discretion or judgment(especially of funds) not earmarked; available for use as needed