crosstrees的翻译，读音
英/'krɔstri:z/
释义：
n. 桅顶横桁
n. pl. Pieces of timber at a masthead, to which are
attached the upper shrouds. At the head of lower masts in large
vessels, they support a semicircular platform called the "top."
n. pl. Pieces of timber at a masthead, to which are
attached the upper shrouds. At the head of lower masts in large
vessels, they support a semicircular platform called the "top."