In the 3 soil textures the dynamic change of rhizosphere microorganisms and enzyme activities both turned on a parabola with the peak in the silking stage , and then reducing gradually 3种土壤玉米根际生物活性的动态变化呈抛物线，吐丝期达最大值，此后逐渐下降。
The discovery supports a hypothesis that ancient spiders first evolved to produce silk from their feet before changing to the modern configuration of producing it in their abdomens 这个发现提供了一个假说,蜘蛛的祖先可能是用脚吐丝,只是到了现代才改为由腹部吐丝的
Filament winding is a production technique for composite structures , in which impregnated fiber bundles are guided through a pay - out eye on a rotating mandrel 纤维缠绕是一种制造复合材料产品的加工技术，预浸有树脂的连续纤维束在吐丝嘴控制下沿规定路径铺设在芯模上。
In silking stage , the number of the 3 microorganisms were largest in loam and smallest in clay ; and the 5 enzyme activities were highest in loam and lowest in sandy loam 吐丝期， 3种质地土壤玉米根际微生物数量均表现为中壤最多，重壤最少； 5种酶活性均表现为中壤最大，砂壤最小。
" to my knowledge , no other animals are using silk for locomotion , " said stanislav gorb , a biologist at the max planck institute for metals research in stuttgart , germany 斯塔尼斯拉夫?戈尔博说, "在我们的认知范围内,没有其它动物会将吐丝用于行走. " ,他是德国斯图加特的马普学会的生物学家
Many tiny tubes connect each silk gland with a spinneret . the sticky fluid which coats the strands in orb webs and catching lines is applied in these tubes 许多极细小的导管把每个造丝腺体与吐丝器相连。一些黏液适用于这些导管中，覆盖在蜘蛛网上细丝和抓捕丝上的黏液是通过这些导管涂抹的。
This machine offers high productive efficiency and reliable quality chain link fence products with reasonable design , using computer control , mechanical and electrical integration , automatic control of wire feeding , cutting , rolling and edge treatment 我厂生产的蜘蛛金属丝菱形网织机采用德国技术双丝织网成型原理，不但生产效率高，而且网片质量可靠。该机设计合理，采用微机控制，机电一体化，自动完成吐丝剪切卷网锁边等工序。
In the laboratory when the first - instar larvae , third - instar larvae , and fifth - instar larvae of cotton bollworm fet with all kinds of tissues of transgenic bt cotton , the result showed that transgenic bt cotton can easily cause death to low - instar larvae and this effect deteriorates on high - instar larvae 转bt基因棉对棉铃虫幼虫的行为活动有较大的影响，表现为取食时间明显减少，静息、吐丝下垂和爬行时间明显延长。棉铃虫幼虫取食转bt基因棉后，发育速度的减慢导致其生育期的延长。
