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 .
