短語(yǔ)詞組短語(yǔ)force e polygon 力多邊形force e polygon pole 力的多角形極點(diǎn)force e polygon rule 力多邊形法closed force polygon 合力多邊形;閉合力多邊形force polygon pole 力的多角形極點(diǎn);力的多角形頂面force polygon rule 力多邊形法unclosed force polygon 非閉合力的多邊形closed d force polygon 合力多邊形closure of force polygon 力多邊形閉合 返回 force polygon