慢速英语:Coming Soon to the Office: Facebook at Work

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1. purpose n.目的;意志;作用
例句：The purpose of the occasion was to raise money for medical supplies
那次活动是为筹集资金购买医药物资。

2. productive adj.多产的;富有成效的;生产性的
例句：Training makes workers highly productive
培训提高了工人们的生产力。  

3. announce vt.宣布;述说;声称
例句：He will announce tonight that he is resigning from office
他将于今晚宣布辞职。

4. communicate vt.传达，表达;显示：清晰地揭示
例句：My natural mother has never communicated with me
我的亲生母亲从未和我联系过。

5. invitation n.招待，邀请;请柬，请帖
例句：The Syrians have not yet accepted an invitation to attend
叙利亚人还没有接到出席邀请。