mainmast

基本解释

They came on out on the pier in the blazing sunlight, however, and halted opposite the mainmast to look at me.
可是，他們在強烈的太陽光下繼續走上了碼頭，對著主桅停了下來擡頭看著我。
The head of the house obtained a situation as mainmast in a very fine ship, and can sail round the world when he will.
我們的家長成了一條漂亮的船上的主桅——這條船衹要它願意，可以走遍世界。
It has two masts: a traditional mainmast as on a sloop, plus a smaller mast in the rear of the boat, called the mizzenmast.
它擁有兩根桅杆：一根傳統的主桅，就像在單桅帆船上那根一樣；加上船尾部一根小一些的桅杆，稱爲尾桅(mizzenmast)。

It takes a dozen strong sailors to haul Mariquita's 500-pound gaff to the top of the mainmast, dragging hundreds of pounds of sailcloth up with it.
FORBES: Magazine Article

the most important and tallest mast (= a tall pole that supports the sails) on a boat or ship

the chief mast of a sailing vessel with two or more masts, being the foremast of a yawl, ketch, or dandy and the second mast from the bow of most others