柯林斯詞典trilateral /tra??l?t?r?l/ 1. ADJ having three sides 有三邊的 返回 trilateral劍橋詞典 trilateral adjective (GROUPS) involving three groups or countries 涉及三方的；涉及三國的 A trilateral summit meeting was planned for the following month . 三方峰會計劃在接下來的一個月擧行。 trilateral adjective (SIDES) mathematics having three sides 有三邊的 trilateral shapes 三角形 返回 trilateral