1. School of Mechanical Engineering and Automation, Beihang University, Beijing, China.
2. School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
3. John A. Paulson School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA.
4. Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA.
5. Department of Biology, Boston College, Boston, MA 02215, USA.
6. School of Chemical Science and Engineering, Beihang University, Beijing, China.
7. School of Material Science and Engineering, Beihang University, Beijing, China.