Whether the sound came from his head or from the hollow tree, that no one could say with certainty.

没有人能肯定地说，这声音是从他的脑袋里发出来的呢，还是从空树里发出来的呢？

youdao

The children scrambled out of the hollow tree.

孩子们从树洞里爬出来了。

youdao

But whether the sound came from his head or from the hollow tree, that no one could say with certainty. So now he got the.

音是从它的脑袋里发出来的呢，还是从空树干里发出来的呢，他可没有把握下个判断。

youdao

Using a hollow tube, they drill into the tree and extract a 5-mm wide cylinder that shows each ring starting with the most recent, just under the bark.

VOA: standard.2010.04.05