They provide high quality silk by emptying silkworm excrement and spinning silk. Until the end of their lives, silkworms keep spinning silk. They dedicate their lives to th...
“Climbing up, you would face precipices. When going downhill, you would have to be careful not to slip and fall. You’d have to hold on to vines to be able to take a step,...
FAST stands for Five-hundred-meter Aperture Spherical radio Telescope. It is the world’s largest and most sensitive filled-aperture radio telescope located in the Dawodang...
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