substance例句

This substance has now been cloned by molecular biologists.
该物质现在已被分子生物学家克隆。

Syria will attend only if the negotiations deal with issues of substance.
只有在谈判涉及重大问题时叙利亚才会参加。

There is no substance in any of these allegations.
这些指控都毫无根据。

• #substance