例句：
The sofa also functions as a bed.
这沙发还可当床用。
My camera has manual and automatic functions.
我的照相机有手调和自动两种功能。
Both motor and sensory functions are affected.
运动功能和感觉功能都受到影响。
The hall provided a venue for weddings and other functions.
大厅给婚礼和其他社会活动提供了场所。