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。

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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？

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Confirmation of supersymmetry would be a shot in the arm for M-theory and help physicists explain how each forces 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？

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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

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?

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