So if the web was made entirely out of dragline silk, an insect is very likely to just bounce right off. But by having really, really stretchy capture spiral silk, the web is actually able to absorb the impact of that intercepted prey.
所以如果蛛网全部用拖丝做成 那么昆虫很可能只是 从网上弹开，但是由于有 可延展性极佳的的螺旋状丝 蛛网就能经受住 被拦截的昆虫的冲撞力