A tax on carbon is hardly going to stop the lights going out in a few years, but it would provide a floor price for power, giving investors a clearer sense of likely profits.

在未来几年内碳税几乎不能阻止电灯熄灭，但它将给电力提供一个底价，给投资者一个更清晰的对可能利润的判断力。

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BP has been battling to stop oil spilling out of the well since an explosion on the Deepwater Horizon rig on April 20, an event which triggered a steep plunge in the firm's share price.

4月20日深水地平线钻井平台爆炸以来，英国石油公司一直竭力阻止原油泄漏，此次爆炸导致英国石油股价暴跌。

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If the market moves to your stop loss price, you should get out every single time.

一旦市场移动到你的止损位，你要第一时间止损。

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In order to avoid the possibility of chalking up uncontrolled losses, you can place a stop-sell order at a certain price so that your position will automatically be closed out when that price is reached.

FORBES: How To Place Orders With A Forex Broker

"He should get a grip of his out of touch Government, change course and stop making hard-pressed pensioners and families pay the price for his incompetence, " Mr Dugher said.

BBC: MPs say lack of government strategy causing 'mistakes'

For example, those who enter automatic "stop-loss" orders to sell stocks at a certain level below the current price can be knocked out of positions at a loss when a security suddenly tumbles often at prices well below where they expected.

WSJ: How the Knight Glitch Roiled Investors