照片右侧中部坐在两个女孩中间的是詹姆斯·尼尔森教授，他是这支合唱团参加纽约“俄克拉荷马歌会”的指挥。

At right center, seated between two girls, is Prof. James Nielsen under whose direction the choir is in New York for the "Oklahoma! Song Fest."

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沙漏的中部、小提琴中间凹处、黄蜂的腰部。

The waist of an hourglass, a violin, a wasp.

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系统的目标是通过在网络中部署不同功能组件，充分利用源端、中间网络和目标端三处在防御过程中的优势，来取得一个较好的防御效果。

The target is to get better defense effect with the different function module deployed in network and the advantage of source network, intermediate network and aim network.

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