Tympani
n. 定音鼓
✅ 同义词
🗣️ 情景例句
No, I'm not kidding.
不， 我不是说笑。
To teeter-totter
玩跷跷板
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算别人为我们为所提供的服务的价值却是极其困难的。