目的：探讨中药板兰根、黄芪、贯众、紫花地丁、大黄提取物体外抗病毒作用机制。
Objective:To study effects on spectrum and anti-virus mechanism of 5 Chinese herbal medicines and their composite in vitro.
对金属薄板兰姆波探伤中的一些问题进行了探讨，提出了能量沿板厚分布的计算公式。
Some questions about Lamb waves in nondestructive testing of thin metal sheet were discussed in this paper. The calculation formula of energy distribution along thickness of sheet was advanced.
沃德·克里斯坦森和兰迪·休斯推出了第一个公共拨号公告板系统。
Ward Christensen and Randy Suess launch the first public dialup bulletin board system.
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