These are great exercises for toning the back of the arms the triceps.

这组动作对练习手臂后侧的肱三头肌十分有效。

My triceps and shoulder muscles are significantly weaker than my biceps.

我的三头肌和肩部肌肉比二头肌弱得多。

Bob Goodman controls his bionic arm by contracting his biceps and triceps muscles.

鲍勃·古德曼控制他的仿生手臂收缩他的二头肌和三头肌肌肉。

Those are biceps, and triceps are on the bottom part of your upper arm.

那些是二头肌，三头肌在你上臂的底部。

These single-joint isolation exercises, like curls, side raises, and triceps pushdowns, only tend to focus on one muscle group at a time.

像弯举，侧平举还有三头肌下推都是单关节局部训练，它们只专注于锻炼一个肌肉群。

He could be alone. This morning I heard him do pushups and then talk to his triceps.

应该没有吧。今天早上我听见他做俯卧撑后来还跟他的三头肌说话。

So the biceps will shorten while the triceps will lengthen or relax, pulling up the arm and making it bend at the elbow.

所以在肱三头肌伸展或者放松时，肱二头肌就会收缩，完成胳膊举起，向着手肘弯曲的动作。

I noticed she was wearing her wedding ring but not the diamond engagement ring that was large enough to ensure a triceps workout.

我注意到她戴着她的结婚戒指，但没有戴足够大的钻石订婚戒指来锻炼肱三头肌。

If you looking for a Rom-com, you'll know to avoid The Expendables because of the poster with a skull, guns, biceps, triceps...is, is that a trapezoid? Just way too much testosterone.

如果你想看浪漫喜剧，你会知道要避开《敢死队》，因为那海报上有头骨、枪、二头肌、三头肌… … 还有梯形的吗？反正就是有很多睾丸素（男性荷尔蒙的一种）。

It's ok, I know how it is. This machine here will work out your upper body, mainly your triceps and biceps. Are you looking to develop strength or muscle tone and definition?

没关系，我知道。这台机器首先从你的上半身开始起作用，主要是肱三头肌和二头肌。你是想增强力量还是锻炼肌肉和线条？