lever
noun [ C ] uk/ˈliː.vər/ us/ˈlev.ɚ/
(BAR/HANDLE)
杠杆，操纵杆，控制手柄
a bar or handle that moves around a fixed point, so that one end of it can be pushed or pulled in order to control the operation of a machine or move a heavy or stiff object
(ADVANTAGE)
（用以说服别人的）手段，把柄
something you use, often unfairly, to try to persuade someone to do what you want