To restrict the contents of the collection, requiring specific topic types or roles at specified positions within the collection.

限制集合的内容，要求在集合中的特定位置出现特定的主题类型或者角色。

youdao

But we didn't restrict calories at all.

但我们根本没有限制摄入的热量。

youdao

The international bodies called on countries not to restrict exports of food to secure supplies at home, warning that could make the problem worse.

国际机构呼吁各国家不要限制对食物的出口，以确保家庭的粮食供应，否则，问题会日趋严重。

youdao

.. So I'm going to restrict myself, at least when I think about it, to versions that say, it's the life of a person per se that's valuable.

所以我会坚持，至少是对我来说，我会坚持，作为人活着的本身是有价值的这种观点。

耶鲁公开课 - 死亡课程节选

Regulators at both the FDA and the Centers for Medicare and Medicaid Services may see reason to try to restrict use at first to the highest risk patients.

FORBES: New Heart Valves Prove We're Living In The Future

And also, if we're going to restrict protest at military funerals, why not sort of expand that to countless other families that have been targeted by that group?

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

Such bilateral deals have allowed, for example, Britain and America to restrict coveted slots at London's Heathrow to two British and two American carriers.

ECONOMIST: Opening skies | The