只有一根桅杆，相应的支索和侧臂也少，要做的管理和保养工作也更少。
Less standing and running rigging with one mast - less to manage and maintain.
俯卧，用肚皮支撑身体，两臂在身体两侧，手掌向上。
Lie on your belly with your arms alongside your body, palms facing up.
因为电脑包通常有手柄，这对于锻炼屈臂、侧举、或是单臂弯曲非常有好处。
Because computer bags usually have handles, these can be great for exercises like bicep curls, lateral raises or one-armed rows.
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