Some sea urchins海胆 have venomous (toxin) spines

Insect pests are among the leading causes of crop failure.

The flower bud of a water lily 百合 opens at sunset since .its opening is triggered(commence) .by the decreased light.

Ella Grasso, elected governor of Connecticut in 1974, supported the enactment (given, granted) of a freedom-of-information law.

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