切实减轻中小学生过重的课业负担的英文：
effectively reduce too heavy homework assignments for primary and secondary school students

参考例句：

Effectively reduce too heavy homework assignments for primary and secondary school students
切实减轻中小学生过重的课业负担

effectively是什么意思：
adv. 有效地；有力地；实际上

This parameter has no effect.
此参数不起作用。

The drug was of no effect.
这药无效。

The helpful effect on propellant slosh effects was a secondary consideration
推进剂晃动的有利性影响是一个次要的考虑因素。

reduce是什么意思：
v. 缩减，减小；简化；将…还原；节食；降职

be reduced to (a) pulp
变成浆状,成纸浆 [软块]

They held a sale to reduce their inventory.
他们降价出售库存货物。

To reduce in rank;demote.
使降职，使…降级

heavy是什么意思：
adj. 沉的；超出一般的；辛苦的；厚的；繁忙的；耗费...的；危险的；沉闷的；严厉的
n. 保镖；苦啤酒

a truck; a heavy duty truck
载重汽车

Light Burdens far heavy
远途无轻担

An elephant has a heavy build.
大象躯体庞大。