n.主桅的帆，主帆，主桅帆...

Clew the mainsail down, the wind is too strong.拉下主帆, 风太大了....

mainsail的音标：mainsail的英式发音音标为：['meɪnseɪl]mainsail的美式发音音标为：['mensəl, -ˌsel]...