a flex of [body part]
He showed a flex of his biceps.
他展示了二头肌的屈曲。
弯曲动作；绷紧肌肉的动作
flexes — plural of flex
柔韧性；弹性；软线；花线；柔性风管；软风管；拐点；灵活性,柔韧性。
An act of flexing a muscle or limb.
灵活性,柔韧性。
Flexibility, pliancy.
弯曲的动作。
An act of flexing.
柔性绝缘电线。
A flexible insulated electrical cord.
柔性管道,通常为金属线圈外覆柔性塑料以形成管状。
Flexible ductwork, typically flexible plastic over a metal wire coil to shape a tube.
拐点。
A point of inflection.
The plumber adjusted the flex in the hose to prevent kinking.
水管工调整了软管中的弯折以防止扭结。
用法提示：flex作为名词，指管子或软管中的弯曲部分。
His bicep flex was the highlight of the bodybuilding competition.
他的肱二头肌屈曲是健美比赛的亮点。
用法提示：flex作为名词，指肌肉屈曲的动作。
The engineer calculated the maximum flex of the beam under load.
工程师计算了梁在负载下的最大挠度。
用法提示：flex作为名词，指梁的弯曲或挠度。
He showed a flex of his biceps.
他展示了二头肌的屈曲。
常用于展示肌肉的场合。
She did a flex to demonstrate her strength.
她做了一个屈曲动作来展示力量。
也可用于非肌肉的关节弯曲。
With a flex of his wrist, he turned the knob.
他手腕一屈，转动了旋钮。
bend 比 flex 更通用，不特指肌肉或弹性材料的屈曲。
curve 强调平滑的弧形弯曲，与 flex 的屈曲动作在物理形状上相关，但非直接同义。
grammar · medium
易错句子This rope lacks flex.
正确表达This rope lacks flexibility.
误将名词flex（屈曲动作）当作名词flexibility（柔韧性）使用。Flex指具体的弯曲动作，而柔韧性需用flexibility。
grammar · medium
易错句子He showed flex in his arms.
正确表达He showed a flex in his arms.
Flex作为可数名词（屈曲动作）需要冠词a/an。缺少冠词是常见错误。
反义词注：flex 作名词指屈曲动作时，extension 为其直接反义，表示伸展动作。
反义词注：flex 作名词指弯曲动作时，straightening 指使其变直的动作。
肌肉屈曲
The trainer demonstrated a controlled muscle flex.
教练展示了一个受控的肌肉屈曲。
肱二头肌屈曲
He held a bicep flex for the photo.
他在拍照时保持肱二头肌屈曲。
手臂屈曲
Arm flexes are common in weightlifting routines.
手臂屈曲在举重训练中很常见。
腿部屈曲
The physical therapist recommended leg flexes daily.
物理治疗师建议每天做腿部屈曲。
膝盖屈曲
Knee flex exercises help improve joint mobility.
膝盖屈曲练习有助于改善关节活动度。
髋部屈曲
Hip flexes are essential for lower body stretching.
髋部屈曲对下半身拉伸至关重要。
展示实力；小试牛刀
The company is flexing its muscles by launching a new product line.
该公司正在通过推出新产品线来展示其实力。
向某人炫耀；在某人面前显摆
He bought a sports car just to flex on his neighbors.
他买跑车就是为了在邻居面前显摆。
行使权威；展示权力
The manager decided to flex his authority by enforcing stricter rules.
经理决定通过执行更严格的规定来展示他的权威。
弯曲、弯曲、弯曲你的肌肉
出自Dizzee Rascal的歌曲《Flex》
From the song 'Flex' by Dizzee Rascal
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.