Thetis
n. [希腊神话]西蒂斯（海神Nereus的女儿）
🗣️ 情景例句
He is in a good mood.
他的心情很好。
Don't be so sure.
话别说得太满。
This decline in vigour with the passing of time is called ageing.
生命力随时间的流失而衰退叫做衰老。