Arm extension is easier.

手臂延伸更容易。

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Combination: Arm extension, horizontal bar, pull-up, stepper trainer, waist Twister.

包含：上肢牵引器、单杠、引体向上、台阶训练器、扭腰器。

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It's this right arm extension that gives your swing power and extra accuracy, and makes chicken-winging almost impossible.

右臂伸展增加了挥杆的力量和准确性，使得你几乎不可能出现鸡翅膀。

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"Frankly,some of the first things that have happened subsequent to his extension of that open arm,open hand, have not been very encouraging, in terms of statements coming out of Tehran,".

VOA: standard.2009.05.05

Zappos.com views its call center employees as an extension of its marketing arm.

FORBES: America's Happiest Employee

Empowered Careers last week began enrolling students in 10 certificate programs to be taught by instructors at the UCLA Extension, the continuing-education arm of the University of California, Los Angeles.

WSJ: UCLA and Start-Up Join Rush for Online Education

Once I got into the groove with my physical body, breath, and mind in tune with each other and my arms warmed up, I was able to hone in on arm and shoulder technique to make sure that they were getting maximum extension and rotation so that my stroke would be strong and efficient.

FORBES: How Cross-Training Can Make You A Better Swimmer: What Is The Best Technique Of Swimming The Crawl?