armour; first; nail; shell
【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
twin; two
【计】 binary-coded decimal; binary-coded decimal character code
binary-to-decimal conversion; binary-to-hexadecimal conversion
【医】 bi-; bis-; di-; duo-
【化】 sulfoacid; sulfonic acid
【医】 salfacid; sulfo-acid; sulfonic acid