Yet mr obama keeps pulling levers that do not work .

然而，奥巴马一直在拉动根本不起作用的杠杆。

In many places the policy levers look flimsy .

许多国家的政策杠杆软弱无力。

A second theory suggests that the blocks were placed using long levers with a short angled foot .

第二种理论指出这些石块是由支点端的长杠杆放置上去的。

But all levers can work in two directions -- for good or bad .

但所有杠杆都可以朝两个方向施力-或者是好或者是坏。

Mr livingstone ran london as a machine ; mr johnson occasionally appears to forget where the levers are .

列文斯通掌管下的伦敦运行犹如一台机器；约翰逊先生时不时就会忘记杠杆在哪儿。