The thick webbing is called stabilimentum, a structural flourish which some scientists think serves to make the webs more visible to birds, which might otherwise fly into them. 那些較粗的蛛網(wǎng)叫做匿帶，科學(xué)家認為它可以使得飛過(guò)的鳥(niǎo)兒看見(jiàn)而繞開(kāi)從而避免網(wǎng)被撞破。
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