have a net gain
获得净收益
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With half of the counties having redeclared, Mr Gore appears to have made a net gain of about 200 votes.
BBC: Bush camp raises stakes
However, he added that as there were no large-scale biorefineries in operation, the team did have to estimate how much bioethanol such a plant would be able to produce in order to calculate the net energy gain.
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