In fact, for years, the Tropic of Cancer and the Tropic of Capricorn have been steadily drifting towards the equator at the rate of about 15 meters per year, and nobody told me that.
事实上，在很长的时间中，北回归线和南回归线 在稳定的以每年15米的速度 朝着赤道移动。 而没人告诉过我这点。