chin-strap

n strap on a helmet, etc, that fastens under the chin 下颏带（钢盔等上系在颏下的带子）.

chili, chill, chilli, chilli con carne, chilliness, chilling, chilly, chime, chimera, chimera (also chimaera), chimerical, chimney, chimney-breast, chimney-piece, chimney-pot, chimney-stack, chimney-sweep (also sweep), chimp, chimpanzee, chin, chin-wag, china, china clay, china-cupboard, chinaware, chinchilla, chine, Chinese, chink, chinless, chintz, chip, chipboard, chipmunk, chipolata, Chippendale, Chippenham, chippings, chiropodist, chiropody,