ac four-arm bridge的用法和样例：
- Four armed robbers forced their way into a Long Island house where they tortured a woman with a hot iron, then made off with$5,000 in cash and jewelry, police said yesterday.
- It has two heads, two necks, four arms, eight fingers and six legs.
- Three arms and four arms, double hoist the belt catch clow vice-arm.
- He is depicted as a big-bellied, yellow or red god with four arms and the head of a one-tusked elephant, riding on, or attended to by, a mouse.
- "One who worships God without form perhaps sees at first the deity with ten arms, then the deity with four arms, then the Baby Krishna with two arms.