但是那并不意味着对于一些精神失常的人，在枪支使用方面的有效控制是不可能的，或是对于何种枪支可供出售的限制注定会失败。

But that does not mean that more effective checks on the mentally unstable are impossible, or that restrictions on the killing power of what can be sold are doomed to failure.

youdao

新的合作社可以使用财产，拥有设备，并可以以市价出售商品；主要的限制就是合作社不能雇佣劳力。

The new cooperatives could use property and own equipment, and they could sell at market prices; the main restriction was that they could not employ hired labor.

youdao

例如，这些限制，使得我们几乎不可能出售F - 22战斗机给日本。

For example, there are restrictions that make it all but impossible to sell F-22s to Japan.

youdao