This is the 513th most frequent Chinese word.
各级
"各级" means "all levels" or "various levels" in English.
This usage of '各级' (each level) indicates levels of organization or hierarchy, in this case, referring to various administrative levels of government.
各级政府正在努力解决环境问题。
Governments at all levels are making efforts to address environmental issues.
Here, '各级' (each level) applies to the professional ranks of teachers, implying inclusivity across the hierarchical categories.
学校组织了各级教师参加专业培训。
The school organized teachers of all levels to attend professional training.
In this context, '各级' (each level) refers to the skill or experience levels of participants, encompassing a diverse range of abilities.