你是否对使用另一种语言有根本性的需求是成为一个双语能力者的决定性因素——与别人交流沟通的需要，学习或工作上的需要，参与社交活动等的需要。
The crucial factor underlying becoming bilingual is the need for another language — the need to interact with others, to study or work, to take part in social activities and so on.
科菲表示：“夏季社交活动频繁，求职者应充分利用打高尔夫球、与邻居聚会等机会，扩大人脉网。”
"Summer is a social season," notes Coffey. "So take advantage of occasions like golf outings and neighborhood get-togethers to expand your professional network."
购物会涉及体能活动、与其他购物者的社交活动，因为购物作为一向复杂的任务，会让你保持思维活跃。
Shopping is going to involve physical activity, social interaction with other shoppers and because it's quite a complex task it's going to keep you mentally active.
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