The effect of tension on arm of force was studied that: forward tension can enhance the arm of force.

连轧过程张力是最主要的因素，研究了张力对力臂的影响规律：前张力使力臂增加。

youdao

In medieval times, a lance couched under the rider's arm, unifying the force of rider and weapon, would throw its wielder backwards off the horse at impact.

在中世纪，一把长矛被放在骑手的臂膀下，以统一骑手和武器的力量，一旦受到冲击，持兵器者就会向后摔下马去。

youdao

Confirmation of supersymmetry would be a shot in the arm for M-theory and help physicists explain how each force at work in the universe arose from one super-force at the dawn of time.

如果能证实超对称性的确存在，那无异于为M理论注入了一针强心剂，物理学家们可以借此来解释宇宙诞生之初，各种作用力是如何从一种超级作用力里诞生的？

youdao

Consumption has seen a secular improvement, but it is more of a stabilizing force rather than a shot in the arm.

FORBES: China Outlook Improving; Time For A Rebound?

In 2007, just before the financial crisis hit with full force, GE's finance arm accounted for about 55 percent of the company's earnings, according to spokesman Seth Martin.

WSJ: General Electric gets out of the TV business

While Home Depot is reportedly replacing 10, 000 BlackBerry smartphones with iOS devices, the New Zealand police force plans to arm 6, 000 officers with iPhones and about two-third of them with iPads over the next three months.

FORBES: Apple Snaps Up Enterprise Customers At BlackBerry's Expense