常見(jiàn)例句Braces are used for the column matrices to distinguish them from rectangular matrices usually put in square brackets.大括號(hào)用于列矩陣，以便使列矩陣與矩形矩陣區(qū)分開(kāi)，矩形矩陣通常采用方括號(hào)。 返回 square matrix