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This is a threefold jump since the collapse of lehman brothers on september 15 .

自从9月15日雷曼兄弟（lehmanbrothers）破产以来，这个数字已经跃升三倍。

Almost a fifth of american ballots are now cast by mail , a threefold increase over 30 years .

美国几乎有五分之一的选票是经邮政投递的，这一比例在过去30年内增长了三倍。

The cff 's goals are threefold : to increase conservation measures supporting commercial fish stocks and their natural habitats ; to revitalise the region 's coastal fishing communities and to help fishery-related businesses to make the transition from open-access to a catch-share based management regime .

cff有三重目标：增加保持经济鱼类资源及其自然栖息地的环境保护措施；振兴该地区沿岸渔业社区；帮助渔业相关企业，实现从开放式捕鱼到基于个别配额的管理体制的转变。

Studies of an ice core from mount everest show that from 1975 to 2000 the black carbon rose threefold .

一份研究表明，珠穆朗玛峰冰山上的物质在1975－2000年间，黑碳含量上升了三倍。

According to a banker familiar with the deal , once dividends and borrowings are taken into account , tpg earned a threefold return on investment .

据熟悉这笔交易内情的一位银行家说，计入股息及借款后，tpg这笔投资的回报达三倍。