"Dead zones" with almost no oxygen already make up around 2 per cent of the oceans by area, and they could expand seven-fold.
几乎已经没有氧气的“死亡区”，现占到海洋总面积的百分之二，这个数字可能会扩大七倍。
The initiatives announced today should increase that proportion at least seven-fold over the next four years, to 15% or more.
今天所宣布的这两项倡议在未来四年内应使该比例至少增加7倍，达到15%或更多。
The country, already the world's biggest energy consumer, plans to expand nuclear capacity by seven-fold by 2020.
这个国家已经成为世界上最大的能源消耗国，并计划到2020年使核电发电量增加7倍。
UK-funded research shows climate change has caused a seven-fold increase in cases of malaria on the slopes of Mount Kenya.
英国资助研究显示气候变化已经导致肯尼亚山山坡疟疾7倍的增长。
South Africa said it had cancelled a contract to buy eight of the aircraft because of delays and a seven-fold cost rise in rand terms.
南非表示，它已经取消了购买八架飞机的合同，原因是由于飞机延迟交付和成本上升了7倍。
South Africa said it had cancelled a contract to buy eight of the aircraft because of delays and a seven-fold cost rise in rand terms.
南非表示，它已经取消了购买八架飞机的合同，原因是由于飞机延迟交付和成本上升了7倍。
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