知海（拉丁文：Mare Cognitum）是月球正面位于风暴洋第二环内一座盆地或大陨石坑里的月海。它西北坐落的里菲山脉是已被掩埋的撞击坑或盆地的部分边缘。该月海原先没有名称，1964年因被选定为徘徊者7号空间探测器的撞击目标获名。徘徊者7号是美国首艘发回近距离月表照片的航天器。
未知海域 Abzu
海内存知己，天涯若比邻 "If you have a friend afar who knows your heart; distance can't keep you two apart."
海津知香 Chika Kaizu ; chelloka kaizu
海关知识产权保护合作行动计划 the action plan on IPR customs enforcement
未知海疆 ABZU
动物如何预知海啸 CAAI Transactions on Intelligent Systems
不知火海 SHIRANUI-KAI ; shiranui sea
通知与海报 Notice and Poster
知非诗诗，未为奇奇，海是大的，大到几乎一片空白，那灿烂的霞光却铺在天边，这就是何海霞。
Without the Tao, never is there wonder in poetry. The sea is big, its wide expanses spread out to the horizon where the sun casts its glorious rays.
某些心理疾症明显是导因于大脑组织的病变，例如阿兹·海默症，但是绝大部分这类疾病的致病机转，医界仍然不知道知或未能证明。
Some mental disorders, such as Alzheimer disease, are clearly caused by organic disease of the brain, but the causes of most others are either unknown or not yet verified.
只目光敏锐的虎头海雕在知床半岛布满浮冰的海面上盘旋搜寻可能跃出水面的鲱鱼。
The keen eyes of a Steller's sea-eagle seek the flash of herring between ice floes off the Shiretoko Peninsula.
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