translation.en: That means you, your neighbor, your cellphone, the auditorium can become a black hole if you can figure out how to compress it down to the size of the Schwarzschild radius.
translation.zh: 这意味着你的邻居，你的手机， 还有礼堂都能成为黑洞 如果你能弄明白 如何把它压缩至史瓦西半径大小。