* action
n. 行动，作用，活动
The time has come for action.
行动的时候到了。
a man of action
实干家
* act 1
v. 行为，举止
It is an act of kindness/a kind act to help a blind man across the street.
帮助盲人过马路是做好事。
* act 2
n. 法令，法律
an act of Parliament
议会法令
* active 1
a. 忙碌的，好活动的
She's over 80, but is still very active.
她 80 多了，但仍旧很活跃。
games for active youngsters
面向好动年轻人的游戏
* active 2
a. 积极的
He became politically active at college.
他上大学的时候开始在政治上积极起来。
The Bureau is active in promoting overseas investment.
该机构积极促进海外投资。
* activate
v. 使……活跃
Cooking fumes may activate the alarm.
烹调时的油烟可能会触发警报器。
* transact
v. 做(交易)，办理(业务)
Most deals are transacted over the phone.
大多数生意都是在电话里成交的。
* transaction
n. 交易，业务，买卖
The bank charges a fixed rate for each transaction.
银行对每一笔业务都收取统一费用。
financial transactions
金融业务

* interact 1
v. 交流，交往
Lucy interacts well with other children in the class.
露西和班里的其他孩子相处得很好。
* interact 2
v. 相互作用
The immune system interacts with both the nervous system and the hormones.
免疫系统与神经系统及荷尔蒙相互影响。
* interaction 1
n. 相互影响
Price is determined through the interaction of demand and supply.
价格是通过供需消长而定的。
* interaction 2
n. 互相交流
the degree of interaction between teacher and student
师生之间交流的程度
* interactive
a. 交互的
interactive computer systems
交互式计算机系统
the museum's interactive exhibits
博物馆的互动展品
* react
v. 回应，反应
Pinch me and I will react.
你要掐我我就有反应。
* reaction
n. 反应
the government's reaction to the fuel crisis
政府对燃料危机的反应