这位老西部警长总是随身携带他的六发左轮手枪。

The old West sheriff always carried his ___six-gun with him.

这位牛仔的腰带上别着一把六发左轮手枪，这是西部精神的象征。

The cowboy had a ___six-gun strapped to his belt, a symbol of the Wild West spirit.