The large muscle at the back of the thigh that flexes the knee joint.

大腿后侧使膝关节屈曲的大型肌肉。

The large muscle at the front of the upper arm that flexes the forearm.

肱二头肌位于上肢前面使前臂屈曲的大型肌肉

Sandy flexes his brow characteristically,one of those Latin gestures reflecting something too delicate or imprecise to say(Scott Turow)

山迪颇具特色地皱了皱眉头,这是一种拉丁人对微妙说不清的事情的暗示(斯科特·图罗)

The large muscle at the front of the upper arm that flexes the forearm.

位于上肢前面使前臂屈曲的大型肌肉。

He flexes , raises his drumsticks, then brings them resoundingly down. Only in the final frames do you discover that the gorilla is pitching Cadbury's Dairy Milk chocolate.

它弯下身体，举起它的鼓槌，一锤击下，全场轰动。只有在最后一幅画面你才会看出，大猩猩所代言的是吉百利牛奶巧克力。

Adie looks down at her feet, flexes and points. "I think I'd go crazy, " she says. "Like I was trapped. "

爱狄低头看着自己的脚，柔软，瘦削。“我想我快疯了，”她说到：“好像我被捆住了。”

China flexes its muscle at a moment when other powers feel less confident about their future and are under pressure to stand strong.

当其它强国对于未来的信心减弱，并面临着需要“逞强”的压力之际，中国开始摩拳擦掌。

As Asia flexes its growing economic muscle, smart companies must be prepared to handle the ensuing tsunami of cross-language data.

当亚洲人开始炫耀自己的经济肌肉时，聪明的公司必须为随之而来的跨语言数据海啸做好准备。

And it needs to stick to its principles when China flexes its diplomatic muscle.

当中国在玩弄外交手腕时，韩国应该坚持自己的原则立场。

The researchers postulated that, when the jaw moves, the sinus wall flexes , ventilating the sinuses.

研究者们假设，下颌运动时，鼻窦壁也会随之伸缩，令鼻窦中空气流通。