Some sea urchins海胆 have venomous (toxin) spines

The first important exposition in the United States was held in Philadelphia in 1876.

In 1974 Henry Aaron broke Babe Ruth's monumental lifetime record of 714 home runs.

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

Communicationisoneofthemostimportantbondsthatholdculturalsystemstogether.