随着贵金属价格全面上涨，一些大商家通过以预先商定的价格大量买入黄金来遏制成本上升，这一策略被称作对冲。

With precious metals prices up broadly , some big merchants also are attempting to contain costs by buying large amounts at a preset price, a strategy called hedging.

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每次参与游戏的大约有五十人左右，绝大多数是二十多岁，驾驶跑车的青年人。每当子夜时分，他们便会聚集在城市北部预先商定好的地点。

The 50 or so drivers, most of them in their twenties and driving sports utility vehicles, gather at midnight at designated meeting points in the north of the city.

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而且，合同应规定球员所得的酬劳，并应预先商定其结束日期[3]。

Furthermore, a contractshall provide for the remuneration due to the player and shall be concluded fora predetermined period of time11.

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而且，合同应规定球员所得的酬劳，并应预先商定其结束日期[3]。

Furthermore, a contractshall provide for the remuneration due to the player and shall be concluded fora predetermined period of time11.

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