常見例句The ObjectLen() function returns the length of an object expression. Note that only line and polyline objects have length values greater than zero; 函數(shù)可以統(tǒng)計(jì)直線或折線的長度。不知道你爲(wèi)什麼說它衹能統(tǒng)計(jì)直線長度，再好好看看。 返回 objectlens