noun 下载 🔗分享 主帆, 大帆 The largest (or only) sail on a sailing vessel. Examples : "The sailor hoisted the mainsail, and the boat began to move faster across the water. " 水手升起了主帆,船就开始在水上加速行驶。 nautical sailing vehicle 与AI对话词汇游戏阅读练习