flex
verb uk/fleks/ us/fleks/
(bend)
[ T ]活动（手臂、腿等）;使（肌肉）绷紧
to bend an arm, leg, etc. or tighten a muscle
First, straighten your legs, then flex your feet. 首先，伸直双腿，接着活动双脚。
He tried to impress me by flexing his huge muscles. 他绷紧他那些大块的肌肉，想吸引我注意他。
Idiom
flex your musclesidiom (US flex your muscle)（通过军事、政治或经济实力的展示向对手）显示实力，显示力量
to try to worry an opponent or enemy by publicly showing military, political, or financial power
The parade is the first sign of the new regime flexing its military muscles. 阅兵式是新政权显示其军事实力的第一个信号。
See also: muscle-flexing
flex
noun UK uk/fleks/ us/fleks/ (US cord)
(WIRE)
[ C or U ]（一段）花线，（一段）皮线
(a length of) wire with a plastic cover used for connecting a piece of electrical equipment to a supply of electricity
The flex on this iron isn't long enough to reach the socket. 熨斗的花线不够长，接不到插座上。
- More examples
- The appliance comes with a flex and a plug.
- Take particular care not to leave electrical flexes trailing where people can trip on them.
- He tried to strangle her with a length of flex.