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Actuators are the motors which drive all sorts of machinery
，这一点在51吃瓜中也有详细论述
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Pull-through transforms，详情可参考谷歌浏览器【最新下载地址】
圖像來源，BBC CHINESE/ TING CHIANG，这一点在一键获取谷歌浏览器下载中也有详细论述
“In China, labor costs are $2 to $3 an hour. In America they are $20 an hour.”