motion n. 运动，动作 v. 运动
例句：Simon opened the door and motioned me to come in.
西蒙打开了门，招手让我进去。

emotion n. 情绪，情感，感情
例句：I hate this kind of cheap emotion so I left him.
我讨厌这种肤浅的感情，所以我离开了他。

emotional adj. 情绪的，情感的
例句：Steven's emotional language reduced many of the audience to tears.
史蒂文满怀感的话语使许多观众流下眼泪。

motive n. 动机，目的 adj. 发动的，运动的
例句：The police have excluded robbery as a motive for the murder.
警方已排除该谋杀案中有抢劫的动机。

motivate v. 激发
例句：Every manager must motivate and encourage his employees.
每个管理者都必须激励和鼓励他的雇员。

stability n. 稳定性
例句：The government has taken a measure to maintain the stability of prices.
政府已经采取了措施以确保物价稳定。

stabilize v. 稳定
例句：The government took measures to stabilize prices.
政府采取措施稳定物价。

stable adj. 稳定的
例句：A stable government is essential to economic growth.
稳定的政府对经济增长是重要的。