Water is the natural medium in which fish live.
水是鱼类赖以生存的自然环境。
Water is the natural medium in which most fish live.
水是鱼类生活的自然环境。
Water is the natural medium in which most fish live.
水是大多数鱼类生活的自然环境。
Cities are the carrier of human culture and a natural culture medium of literature.
城市是人类文化的载体，也是文学天然的培养基。
The Human serum is often used in the cell culture essential for natural culture medium.
人血清可用于需要天然培养基的细胞培养。
The Human serum is often used in the cell culture essential for natural culture medium.
人血清可用于需要天然培养基的细胞培养。
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