acre【 'eikə】 
n.英亩,地产,大片田地
He owned a two hundred acre farm.
他拥有一个两百英亩大的农场。
This land will carry ten cows to the acre.
这块土地每亩可喂养十头牛。
across【 ə'krɔs】 
adv.横过,交叉地,在对面;prep.越过,交叉,在……的那边,在……对面那边
Let's check out the new bar that opened across town.
让我们去看看在镇那头新开的酒吧。
I hope you come across a lot of luck!
我希望好运围绕着你。
act【 ækt】 
n.幕,法案,法令,动作,举动,节目,(戏剧的)幕;vi.行动,产生……的效果
He acted as if he were better than I.
他表现得就好像他比我更好似的。
His act didn't fool me.
他的行为无法愚弄我。
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action【 'ækʃən】 
n.动作,作用,战斗,行动,举动,行为,(戏剧或书中)的情节,(某一地区、领域或团体中)最能产生效果、最有趣、最有刺激性的活动;vt.对……起诉
His actions are in accord with his words.
他言行一致。
His actions indicated he cared only for himsel
他的行为说明他只在乎自己。
activate【 'æktiveit】 
vt.刺激,使活动;vi.有活力
The president decided to activate the National Guard.
那个总统决定启用国家国民警卫队。
I think if you flip the blue switch near the bottom it will activate the air conditioner.
我认为,如果你把靠近下方的蓝色开关轻轻地推上,冷气就会出来了。
active【 'æktiv】 
adj.积极的,能起作用的,现行的,主动的,活动的,活跃的,活性的;n.积极分子
He actively tried to sabotage me!
他千方百计地想要阻挠我。
It is recommended that women stay active when they are pregnant.
专家建议妇女在怀孕的时候也要经常活动。
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activist【 'æktivist】 
n.激进主义分子,行动主义分子
During college, I was an avid environmental activist.
在大学期间,我是一个热衷于环境问题的积极分子。
Activists demonstrated outside City Hall.
激进主义分子在市政厅外示威。
activity【 æk'tiviti】 
n.活跃,活动性,行动,行为,放射性
The doctor told him to avoid physical activity.
医生告诉他要避免体力活动。
We love outdoor activity.
我们热爱户外活动。
actor【 'æktə】 
n.男演员,行动者,参与者
He is quite a good actor.
他是一个相当好的演员。
He wanted to be an actor when he grew up.
他长大后想成为一个演员。
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