The motor drives a gear at the top of the tail, causing the tail to swing back and forth, which propels the robot upward.
发动机带动机器人尾巴顶部的齿轮，引导尾巴前后摇摆，推动其上升。
Like magic out of a Harry Potter novel, such a metal could contract on command, or swing back and forth like a pendulum.
像这种仿佛出自《哈利·波特》小说中的魔法一般的金属可以按照指令收缩，或者像钟摆那样前后摇摆。
However, the investor focus may now well swing back to European consumer trouble as August retail Numbers from the continent start trickling out over the next couple of weeks.
然而，随着8月份的零售数据在未来几周内陆续出炉，投资者关注的焦点可能将回到欧洲消费市场所面临的麻烦。
Some executives argue that the recent slowdown could be because companies are over-reacting to new uncertainties, which could lead activity to swing back once some form of confidence returns.
一些高管提出，近期经济放缓可能是因为企业对新的不确定性反应过度；一旦信心有所恢复，经济活动将随之回暖。
A motor is used for supplying power to automatically drive a seat plate to swing back and forth.
它用电机作动力自动驱使坐板来回摆动。
When the lamplighter knocked against them, or the wind blew through the cathedral, they would swing back and forth like pendulums.
他看到当点灯者撞到他们或者风吹过教堂的时候，这些灯就会像钟摆一样来回摆荡。
When the lamp-lighter knocked against them, or the wind blew through the cathedral, they would swing back and forth like pendulums.
当掌灯人碰到那些油灯，或者风吹进教堂的时候，油灯就会像钟摆似的来回摇摆。
Dad broke the stillness by walking slowly to the empty candy box lying on the floor. He picked it up, and dangled it by the string and watched it swing back and forth.
父亲打破了僵局，他慢慢走向躺在地上的空糖盒，捡起来，拎着绳子晃了两晃，看着它来回摆动。
He was visibly relaxed, using his heels to rock the porch swing back and forth. Observing the 1 antics of squirrels in a cluster of 2 pecan trees. 3 Gauging the weather with squinting eyes.
他显然很放松，时而用脚后跟蹬地，坐在门廊的秋千上来回摆动，时而注视着那些松鼠在一丛山核桃树上的滑稽举动，时而眯着眼预测天气。
He was visibly relaxed, using his heels to rock the porch swing back and forth. Observing the 1 antics of squirrels in a cluster of 2 pecan trees. 3 Gauging the weather with squinting eyes.
他显然很放松，时而用脚后跟蹬地，坐在门廊的秋千上来回摆动，时而注视着那些松鼠在一丛山核桃树上的滑稽举动，时而眯着眼预测天气。
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