1. In terms of the formation process of the bubble cloud, it first emerges in the focal region, then grows upward to the post-focal region, and finally forms in the pre-focal region.
从形成过程来看，空化泡群首先出现在焦域，然后在焦域后区（远离换能器的区域）形成，焦域前区（靠近换能器的区域）空化泡群最后形成。
2. Facing this focal point war, both sides do not want to say before the game too the loquacity scattered energy, "this kind of focal point war, uses the foot to speak finally! ""
面对这场焦点战，双方都不想赛前说太多话分散精力，“这样一场焦点战，最终还是用脚说话！”
3. Surprisingly, the size of the "sweet spot" depends only on the main mirror's focal ratio (the mirror's focal length divided by its diameter) and not its size.
另人意外的是，“甜点”的大小依赖于主镜的焦比（镜面的焦距与直径之比）而不是它的口径。
4. The result reveals that small geometric focal length and large angle may decrease the -3dB focal area, and increase length to width ratio and the pressure magnitude of main lobe.
由结果得知，曲率半径愈小张角愈大会导致烧灼面积减小、长宽比增加以及压力主峰值的提高。
5. New infection of truncation parameter on focal shift and focal switch is investigated when studying Laguerre-Gaussian (L-G) beams passing through an aperture-lens separate optic system.
以拉盖尔-高斯（L-G）光束通过光阑-透镜分离的光学系统为例，研究了截断参数对焦移量和焦开关的影响。
