Formulated in 1823, the Monroe Doctrine asserted that the Americas were no longer open to European colonization.

Insectpestsareamongtheleadingcausesofcropfailure.

Communicationisoneofthemostimportantbondsthatholdculturalsystemstogether.

Cream of tartar 酒石 , a weak acid, can be added to egg whites to help them foam泡沫 when they are beaten

Somecosmeticsmanufacturersattempttocapturetherose'sunmistakablefragrance香味insoapsandperfumes.