求翻译：东滩地势平坦，高程在4.2米以下。该区域三面环水，北面是长江口北支水道末端，南面是北港水道，东面是长江口滨海区域。是什么意思？

正在翻译，请等待...

East Beach, a smooth terrain elevation in 4.2 m. The region 3 and the estuary North is North End support waterway North is to the south, Hong Kong is the estuary waters, and on the East beach area.

East the beach topography is smooth, elevation below 4.2 meters.This region three surrounded by water, northern side is the Yangtze River Koubei tributary this unworthy priest end, south side is north the port canal, the east side is the Changjiang delta Binhai region.

Dongtan flat, 4.2 m height in the following. The region on three sides by water, the North branch of Yangtze River estuary ends waterway, is the North channel to the South, is a coastal region in Yangtze River estuary to the East.

正在翻译，请等待...