翻译并给出介绍

A poetry slam is a competition at which poets read or recite original work (or, more rarely, that of others). These performances are then judged on a numeric scale by previously selected members of the audience.

At a poetry slam, members of the audience are chosen by an M.C. or host to act as judges for the event. After each poet performs, each judge awards a numeric score to that poem. Scores generally range between a low of zero and a high of ten. In the standardized slam, there will be five judges. The highest and lowest score are dropped, giving each performance a rating between zero and thirty points.

Before the competition begins, the host will often bring up a "sacrificial poet," which the judges will score in order to calibrate their judging.

A single round at a slam consists of performances by all eligible poets. Most slams last multiple rounds, and many involve the elimination of lower-scoring poets in successive rounds. A standar