火柴头通常含有磷，这使得它们能够轻易点燃。

The tip of a match usually contains ___phosphorus, which makes it easy to ignite.

孩子们用夜光涂料在墙上画画，这种涂料中含有磷，能在黑暗中发光。

The kids painted on the wall with glow-in-the-dark paint that contains ___phosphorus.