Mainsail
n. 大桅的帆, 主帆
📖 牛津释义
mainsail
n
principalsail on a sailing-ship, usu attached to the mainmast （主桅上的）主帆. =>illus at yacht 见yacht插图.
🗣️ 情景例句
You asked to see me.
你要求见我。
Children enter school at the age of five,don't they?
孩子们在5岁时入学吗？
Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.
两个人刚开始向岸边游去，就突然惊愕地发现快艇正在转着圈行驶，