translation.en: In an orb-web-weaving spider, you can find seven types of silk glands, and what I have depicted here in this picture, let's start at the one o'clock position, there's tubuliform silk glands, which are used to make the outer silk of an egg sac.
translation.zh: 在一只圆蛛体内 你能找到七种不同的丝腺 而我在这张图中已把它们一一描绘出来 我们从一点的位置开始 这里是管状丝腺 用于制作卵囊的外部