1. Japan, South Korea and China are exploring a trilateral trade agreement, and India and China are looking at a deal of their own. 日本、韩国和中国正在探索一个三边自由贸易协定，印度和中国也期望达成双边自贸协定。
2. The trilateral talks will be strengthened and cooperation sought to reform the UN as soon as possible covered in the outcome of the 2005 UN Summit. 三国将就尽早实现2005年联合国首脑会议成果中所涉及的联合国改革逐步加强对话，寻求合作。
3. Secretary of State Condoleezza Rice wound up her visit by hosting a trilateral meeting with the Israeli defense minister and Palestinian prime minister. 赖斯国务卿在访问结束时主持了由以色列国防部长和巴勒斯坦总理一起参加的三方会议。
英英解释
n.
1. a three-sided polygon
2. involving three parties or elements
3. having three sides
