For example, watch this mustard plant react to a cabbage caterpillar chewing on its leaves by releasing an internal wave of calcium.

例如，观察这棵芥菜对菜青虫咀嚼其菜叶的反应，它会释放出一种内部钙波。

UNIDENTIFIED FEMALE: For example, watch this mustard plant react to a cabbage caterpillar chewing on its leaves by releasing an internal wave of calcium.

例如，观察这棵芥菜植物对卷心菜毛虫咀嚼其叶子的反应，释放出一种内部钙波。