摘要: Silk fibres produced by artificial reeling are superior to those that spun naturally. Commercial silkworm silk is presumed be much weaker and less extensible than spider dragline silk, which has been hailed as a 'super-fibre'1,2,3,4. But we show here the mechanical properties of silks can approach when reeled under controlled conditions. We suggest silkworms might able produce threads compare well with changing their spinning habits, rather having genes altered.