题目内容
Both sides are trying to wear the other down by obstinately (顽固地) sticking to their own positions in the negotiations.
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The secret of a successful school lies in effective co-operation between professional leadership, the government and the local authority.
Energy difficulties are a major barrier to the country’s economic growth due to the fact that imported oil has absorbed 40% of its foreign exchange.
Many suburban residents in the United States put up an invisible electronic fence around their premises to prevent their pets from running away.
“乌鸦报丧，喜鹊报喜”的说法，其错误在于违背了联系的
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