英语语法分析

This is not only a problem in developing countries. About half of all pregnancies globally are unintended.

这不仅是发展中国家的问题，全球约一半的怀孕都是意外怀孕。

This is not only a problem in developing countries, about half of all pregnancies globally are unintended.

这不仅是发展中国家的问题，全球约一半的怀孕是意外怀孕。

In one area, it made painstaking efforts to quantify fertility preference to derive figures for planned and unplanned pregnancies.

在一个领域，它付出了艰苦的努力来量化生育偏好，以得出计划生育和非计划生育的数据。