1.enough to 足以

That's not enough to trigger renewed recession.
这个问题不足以导致美国经济重新陷入衰退。

It tells you enough to get started right away.
它告诉你的东西足够让你立刻开始使用。

2.require to 要求

Drain piping may require to be protected against freezing.
泄水管要求有防冻保护措施。

These objects require to be quarantined on the spot.
这些物品需要进行现场检疫。

3.abide by 遵守；信守

The rules of the race lay out certain regulations which each musher must abide by.
比赛规则制定了特定的管理办法，每位驾驶者都必须遵守。

In his separation agreement, hurd agreed to abide by section 7 for two years.
在赫德的离职协议里，他同意两年内遵守第七章节的内容。

4.insist on 坚持，强调

Customize the product or insist on the cookie-cutter model?
按客户的需求定做产品或者坚持些模型？

I insist on quietness in my room.
我要求在我的房间里要安静。