Sign in | English | Terms of Use
DictionaryForumContacts

   English ⇄
Google | Forvo | +
law of conservation of matter
chem. 质量不灭定律
ecol. 物质守恒定律
met. 物质不灭定律
oil 物质不灭定律

 The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error | Get short URL | Language Selection Tips