That is why it is much easier to float when we are completely under the surface, head and all, than if we try to keep our heads out. (4)

这是我们将头和全身完全钻进水中进行漂浮，比我们试图把头保持在水面上作漂浮，要容易得多的原因。

youdao

That is why it is much easier to float when we are completely under the surface, head and all, than if we try to keep our heads out. (4)

这是我们将头和全身完全钻进水中进行漂浮，比我们试图把头保持在水面上作漂浮，要容易得多的原因。

youdao