关卡

例句：

1. 1. The game has several levels, each with its own unique challenges.
   这个游戏有好几个级别，每个级别都有自己独特的挑战。
2. 2. The player must clear all the levels to progress through the story.
   玩家必须通过所有关卡才能继续故事。
3. 3. The new level added this week is a challenging puzzle.
   本周新增的关卡是一个充满挑战的谜题。