level translation

例句：

1. 1. The students are at different levels of proficiency in English.
   学生们在英语熟练程度上各不相同。
2. 2. The company's performance has been at various levels since its inception.
   自公司成立以来，其业绩在不同阶段有所波动。
3. 3. The level of detail required for this project is quite high.
   这个项目需要非常详细的细节。