单词	[前]桅前帆
释义	[前]桅前帆head sails
随便看	presentation layout schema presentation level presentation manager presentation medium presentation method presentation of colours presentation of colours (或medals) presentation of medals presentation of personal computer instructional system presentation of self presentation position presentation program presentation protocol data unit presentation punishment presentations presentation service access point presentation service data unit presentation service data unit--psdu presentation service data unit，psdu presentation services presentation services layer presentation skills presentation software presentation space presentation space orientation