Because once a country gets plugged in by one cable, they realize that it's not enough. If they're going to build an industry around it, they need to know that their connection isn't tenuous but permanent, because if a cable breaks, you have to send a ship out into the water, throw a grappling hook over the side, pick it up, find the other end, and then fuse the two ends back together and then dump it over.
因为一旦一个国家连接了一条电缆 他们会意识到这是不足够的 如果他们想在 电缆周围建立工业 他们需要知道他们的连接 不是脆弱的而是永久的 因为如果一个电缆断了 你得派船到海中央 扔个抓钩 钩起一头电缆 再勾起另一头 然后把两端焊接在一起 再把它丢到海里