错误把握市场波动会使他们损失惨重(或者，如果投资者是专业基金经理，那么他们的客户会损失惨重)。
Get market timing wrong and they may lose a fortune (or, if they are a professional fund manager, their clients will).
电力系统如果不能认识和把握电力需求周期波动的规律，就无法应对市场的变化，也就无法满足全社会对电力的需求。
So if the power system cannot grasp the rule of power demand cycle fluctuation, it is unable to deal with the market change and satisfy the power demand of the entire society.
他还说，如果市场上下波动，要很有把握的人才敢说，我用不着交易。
When markets are wrenching up and down, he adds, 'It takes a very secure person to say,' I don't have to trade.
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