当海轮在近海上航（háng）行时，海员们常常发现远方一条条长约千米的巨（jù）大海蛇，正在张牙舞（wǔ）爪地向轮船扑来。当轮船驶（shǐ）近时，这海中的巨蛇又不知去向了。原来这不是大海蛇，它们是一种植物，名叫巨藻（zǎo）。巨藻是世界上最长的植物，动辄（zhé）几百 When the seagoing vessel is on a sea voyage, seafarers often find a giant sea snake in the distance of about one kilometer long and are whaling their teeth toward the ship. When the ship approached, the giant snake in this sea did not know where to go. This is not the original sea snake, they are a plant, named zǎo. Macro-algae is the world's longest plant, hundreds of easily