提出了额外性的层次等重要概念。

Such important concepts as hierarchy of additionality were put forward.

额外存储器是空的。

Extra storage is empty.

私人保险公司以给予额外好处或降低保费的形式，对消费者提供额外补贴。

Private insurers passed along the extra subsidy to consumers in the form of additional benefits or lower fees.

出售额外的商品获得的收益至少要能抵补花费的额外的销售成本。

The extra items sold must make enough profit at least to cover the cost of the additional time spent in selling them.

她额外给了他们几份冰激淋。

She gave them extra helpings of ice cream.