The boundary of an area of land is a line in people's imagination that separates it from other areas.
一块土地的边界是人们想象中的一条与其他地区分开的线。
In order to find a scientific basis for the delimitation of the boundary line between sea and land in the Yellow River Estuary, the factors of hydrology, geology, biology, physics, chemistry, etc.
为了寻找黄河口河海划界的科学依据，对影响黄河口河海划界的各种水文、地质、生物、物理、化学等要素进行了丰、平、枯水期的现场测定和室内分析。
In order to find a scientific basis for the delimitation of the boundary line between sea and land in the Yellow River Estuary, the factors of hydrology, geology, biology, physics, chemistry, etc.
为了寻找黄河口河海划界的科学依据，对影响黄河口河海划界的各种水文、地质、生物、物理、化学等要素进行了丰、平、枯水期的现场测定和室内分析。
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