translation.en: And sometimes you can see it even closer than that, because the heads on ships -- that's toilets, for any land lovers that are listening -- are flushed with unfiltered seawater that often has bioluminescent plankton in it.
translation.zh: 其实你还可以更近距离地观察这种发光现象。 因为“船头” 对许多在听的不熟悉海上生活的人来说，其实就是厕所—— 是用未经过滤的海水来冲马桶的。里面通常 都含有发光浮游生物。