She took charge of his small foundation, focusing on New York.
她掌管着丈夫规模不大聚焦于纽约的基金会。
The existence of a space charge field and its strong focusing properties are tested experimentally.
实验验证了空间电荷场的存在及其强聚焦特性。
The focusing properties of a space-charge lens depend on the size, shape and density distribution of its electron cloud.
空间电荷透镜的聚焦特性决定于其电子云的大小、形状和密度分布。
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