头寸的损益情况按当日收盘价计算得出，故变动保证金由清算行或经济商每日收取。
Variable margins are collected by the clearing house daily and the calculation is based on the position's profit and loss from the current day's closing price.
若无预付押金保证金订房或预先通知晚班航班的抵达时间，酒店将保留预订的房间至到达当日下午6点。
Room reservation is held until 6:00pm unless guaranteed by Abvance deposit or late flight details have been advised.
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