他是太阳他是光她是空气她是命
[tā shì tài yáng tā shì guāng tā shì kōng qì tā shì mìng]
He is the sun, he is the light; she is the air, she is life. This describes two individuals where one feels indispensable and full of vitality (sun and light), while the other is seen as essential and vital to their existence (air and life).