真实翻译：North Carolina State University researchers have designed and tested a range of textile fibers that can change shape and generate force like muscles in two new studies. In one study published in the journal Actuators, the researchers focused on the impact of these materials on the strength and contraction length of artificial muscles. These findings could help tailor fibers for different applications. In another proof-of-concept study published in the journal Biomimetics, the researchers tested the fibers as scaffolds for living cells. The research found that these fibers, called fiber robots, could be used to develop 3D models of the human activity system.