“four-sided”例句

单词 four-sided 例句 DEFINITIVE EXAMPLES 权威例句〔foil〕A fencing sword having a usually circular guard and a thin, flexible four-sided blade with a button on the tip to prevent injury.钝头剑，无锋剑：带有一环状保护装置和在顶端带有圆头以防止剑伤的四边剑...