用互相碰撞的小球来模拟疫情的传播，并列举一些有用的防控手段来看看实际效果如何。

i love the #Crew4 patch for no reason whatsoever

https://t.co/ddqeL9Njk2

Acorn barnacles might look like jagged little rocks at low tide, but they have a surprisingly wild sex life. These crusty little animals — related to crabs and shrimp — have the longest penis of any animal relative to their body size. It's up to eight times…

MIT researchers created an ultrathin loudspeaker that can turn any rigid surface into a high-quality, active audio source. The fabrication process can enable the thin-film devices to be produced at scale.

MIT engineers have developed a paper-thin loudspeaker that turn any surface into an audio source. This thin-film loudspeaker produces sound with minimal distortion while using a fraction of the energy required by a traditional loudspeaker. Learn more: ht…

We spy with our little eyes…rover landing gear! During the #MarsHelicopter’s 26th flight, it took photos of the entry, descent, & landing gear @NASAPersevere needed to safely land on Mars. You can see the protective backshell & massive dusty parachute. g…

https://t.co/NiosJDHNKF

这是你熟悉的 Times New Roman： 这也是你熟悉的“Times New Roman”： 注意到区别了吗？叠加起来看一下： 在这里，红色的是第一个“Times New Roman”，蓝色的是第二个“Times New Roman”。这两个“Times New Ro…

可以的，演示用数字手段模拟柔光滤镜的效果：模拟的核心操作就是卷积。高斯模糊看起来不对的原因之一是卷…