英语语法分析

Parents shouldn't completely constrain children's viewing.

父母不应完全限制儿童观看节目。

Reduced operation of the machinery should limit their production and thereby constrain the damage.

要减少机器的操作，就应该限制它们的生产，从而降低损害。

Sometimes environments constrain those people and sometimes environments give those people opportunity.

有时环境会限制这些人，而有时环境会给这些人机会。