Protons are so small that a little dib of ink like the dot on this i can hold something in the region of 500 billion of them, rather more than the number of seconds contained in half a million years.
像字母i上的点小的一滴墨水,就可拥有约莫5000亿个质子,确切一点,要比组成1.5万年的秒数还多。