flex [fleks]

以下由轻松背单词网站提供

n.皮线，花线；vt.弯曲或伸展

to bend an arm , leg , etc . or tighten a muscle

We wound off a couple of yards of wire for a new lamp flex. 我们解开几码电线作为新的电灯花线。
He gave his biceps a flex to impress the ladies. 他收缩他的肱二头肌以吸引那些女士们的目光。