Dicvo

Take an expression with you

This preview contains only public teaching examples or a lesson summary. It excludes your responses, notes, learning history and identity, and is not sent automatically.

Content is internally reviewed; independent language review is pending.

Scientists used a carbon isotope to estimate the object's age. / 科学家利用一种碳同位素估算了这件物品的年代。

Scientists used a carbon isotope to estimate the object's age.

科学家利用一种碳同位素估算了这件物品的年代。

Read the complete entry or lesson — no registration needed · Source and version

You can also select the text and copy it manually. Links printed in a PNG are not clickable; include the text link when sending.