Zhè jiàn shì de xìngzhì hěn yánzhòng.
The nature of this matter is very serious.
Liǎng jiàn shì de xìngzhì wánquán bùtóng.
The nature of the two matters is completely different.
Huàxué xìngzhì hé wùlǐ xìngzhì bùtóng.
Chemical properties and physical properties are different.
