mast
n
1 upright post of wood or metal used to support a ship's sails 船桅; 樯. =>illus at yacht 见yacht插图.
2 tall pole, eg for a flag 长杆(如旗杆).
3 tall steel structure for the aerials of a radio or TV transmitter (电视或无线电发射机的)天线塔.
4 (idm 习语) at half-mast => half. before the `mast (dated or rhet 旧或修辞) serving as an ordinary seaman 当二等水兵
He spent ten years before the mast. 他当了十年的海员. nail one's colours to the mast => nail v.
mast n [U]
fruit of forest trees, eg the beech, oak, etc, used as food for pigs 山毛榉、 橡树等的果实(用作猪饲料).
I suggest that we ask users of this machine what they think about it. We can photograph them using it too. Then we can put their comments at the top of the advertisement in big print. We can bring in some humour too. People enjoy reading humorous ads.