Tau.
[医] 寿命(放射性物质)
🗣️ 情景例句
Sorry, but she is with someone right now.
抱歉，她正在会客。
Let me see what's available.
我查一查看有什么班机。
But animals of this age do not easily become subservient to man,
但这个年龄的象不易驯服，