partly

英 /ˈpɑːtli/ 　美 /ˈpɑːrtli/

The path was partly covered with fallen leaves.

小路上有一部分被落叶覆盖了。

The rise in cycling is partly due to improved infrastructure and growing concern about air quality.

骑自行车的人增多，部分原因是基础设施改善以及人们更加关注空气质量。

搭配

partly because 部分原因是partly due to 部分由于partly responsible 负有部分责任partly cloudy 局部多云

表示部分而非全部；常用partly because说明原因。

part (n.)