noninteractive a. 不相關的，非交互的
radioactive adj. 輻射性的；放射性的；放射引起的
retroactive a. 反動的,追溯的,有追溯力的
例句：
She's very active, considering her age.
就她的年齡來說，她是十分活躍的。
She takes an active part in school life.
她積極參加學校活動。
What is the active ingredient in aspirin?
什么是阿司匹林中的有效成分？
She finds him sexually attractive.
她覺得他富有性魅力。
He was with an attractive young lady.
他與一位漂亮的年輕女子在一起。
He was beguilingly boyish and attractive.
他散發著迷人的孩子氣和魅力。
Deactive resin is regenerated with 3.5% (mol) sulfuric acid solution.
失活樹脂用摩爾分數為3.5%的硫酸溶液再生。
If he's the calm type, he'll become more hyperactive around you.
如果他本身是很冷靜的類型，在你身邊他會變得很活躍。
Sea oats were restless, but their cousins the wild oats were hyperactive.
海燕麥很不安分，可它們的同類野生燕麥更加經歷旺盛。
It also comes at a particularly difficult time for the hyperactive Mr Sarkozy.
這也確實是“亢奮過渡”的薩科齊的一個特別困難的時候。