noninteractive a. 不相关的，非交互的
radioactive adj. 辐射性的；放射性的；放射引起的
retroactive a. 反动的,追溯的,有追溯力的
例句：
She's very active, considering her age.
就她的.年龄来说，她是十分活跃的。
She takes an active part in school life.
她积极参加学校活动。
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.
她觉得他富有性魅力。
He was with an attractive young lady.
他与一位漂亮的年轻女子在一起。
He was beguilingly boyish and attractive.
他散发着迷人的孩子气和魅力。
Deactive resin is regenerated with 3.5% (mol) sulfuric acid solution.
失活树脂用摩尔分数为3.5%的硫酸溶液再生。
If he's the calm type, he'll become more hyperactive around you.
如果他本身是很冷静的类型，在你身边他会变得很活跃。
Sea oats were restless, but their cousins the wild oats were hyperactive.
海燕麦很不安分，可它们的同类野生燕麦更加经历旺盛。
It also comes at a particularly difficult time for the hyperactive Mr Sarkozy.
这也确实是“亢奋过渡”的萨科齐的一个特别困难的时候。