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，他们在强烈的太阳光下继续走上了码头，对着主桅停了下来抬头看着我。
The head of the house obtained a situation as mainmast in a very fine ship, and can sail round the world when he will.
我们的家长成了一条漂亮的船上的主桅——这条船只要它愿意，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.
它拥有两根桅杆：一根传统的主桅，就像在单桅帆船上那根一样；加上船尾部一根小一些的桅杆，称为尾桅(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