He took his cap from under his arm with a flourish and pulled it low over his eyes.

他挥手从腋下取出帽子，拉低帽檐盖住眼睛。

《柯林斯英汉双解大词典》

His one fashion concession was that he did not wear his fur cap and instead carried a hat of pure white under his arm.

唯一一个对装扮的让步就是，他并没有戴着皮帽，而是在手臂上夹着纯白装饰的沿边帽。

youdao

The locking screw (17) and an end (18) are pressed on the arm plate (2) of the support frame by a cap (19).

该锁紧螺钉（17）和端头（18）通过帽（19）压在支架的臂板（2）上。

youdao

Major League Baseball has enjoyed an antitrust exemption since the 1920s, but the players have successfully fought off attempts to curtail their earnings through a strong union that's gained free agency and salary arbitration while keeping a salary cap at arm's length.

FORBES: Sports Business

England had to reorganise their back row when Croft was forced to withdraw with an arm injury, earning Hendre Fourie his fourth international cap against the country of his birth.

BBC: England 11-21 South Africa

Left-arm seamer James Tomlinson, who was awarded his county cap at the start of this match, picked up Arul Suppiah and then Zander De Bruyn for a fifth ball duck when the score was 55.

BBC: Blackwell ton puts Somerset ahead