在俄亥俄州克利夫兰的凯斯西储大学，研究科学家设计了一种4英寸的硅片，可以容纳700个微型原始马达。
At Case Western Reserve University in Cleveland, Ohio, research scientists have designed a 4-inch silicon chip that holds 700 tiny primitive motors.
但是外部刺激并不理想，俄亥俄州克利夫兰凯斯西储大学的生物医学工程学家Dustin Tyler说。
But external stimulation is less than ideal, says Dustin Tyler, a biomedical engineer at Case Western Reserve University in Cleveland, Ohio.
帕特里克·卡塔拉诺博士从产妇和胎儿医学系，在凯斯西储大学美国俄亥俄州克利夫兰市，补充说，这项研究显示，母亲和胎儿明显的好处。
Patrick Catalano, MD, from the Department of Maternal and Fetal Medicine at Case Western Reserve University in Cleveland, Ohio, adds that this study shows clear benefits for both mother and fetus.
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