不幸的是，由于海洋环境的复杂性和海水传播媒介的特殊性，人类探测海洋的手段受到了极大的限制。

Unfortunately, the complexity of the Marine environment and the special properties of seawater as propagating medium have placed limitations on the means of the underwater exploration.

youdao

大众传播媒介是传递信息、实现沟通、促进交流、塑造形象的重要手段。

Mass media are important means of message transmission, communication, and the creation of images.

youdao

大众传播媒介是传递信息、实现沟通、促进交流、塑造形象的重要手段。

Mass media are important means of message transmission, communication, and the creation of images.

youdao