The new speed limit on this road becomes effective from 1 June.

这条路上新的限速规定自6月1日起生效。

When is the contract effective from?

合同什么时候开始生效？

This Agreement is effective from the Effective Date.

本协议自生效日起生效。

The patent right will become effective from the date of authorization proclamation.

专利权自授权公告之日起生效。

So we must direct kids to use educational affiliation more effective from junior class.

因此，从低年级开始，我们就应该指导孩子，让他们有效地操作学具。