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.

The test can identify an unknown substance. / 这项检测可以识别未知物质。

The test can identify an unknown substance.

这项检测可以识别未知物质。

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.