Thermoconvection
热对流
🗣️ 情景例句
Thank you, Grandpa.
谢谢你， 爷爷。
One thorn of experience is worth a whole wilderness of warning.
一次痛苦的经验抵得上千百次的告诫。
Suddenly, she saw a man near a bus stop.'I can ask him the way'.she said to herself.
突然，她在公共汽车站附近看到一个男人。“我可以向他问路，”她想。