在海湾的南部，从紧靠入口处内侧直到第二平潮区，其间距离大约是到海湾的一半，潮流正在回落。

From just the entrance, in the southern part of the bay, up to a second slack water area, about midway up the bay, tidal currents are ebbing.

youdao

如果两物体间距离缩小一半（减小到原来的1/2），则其间万有引力增大到4倍（增大3倍）。

If the distance between two objects is shortened twice, then the gravitational pull grows by a factor of 4.

youdao

浓度梯度按等对数间距设置，半致死浓度采用直线内插法进行计算。

The grades were designed by equal space between logarithm, and the median lethal concentration was computed by Linear Regression.

youdao