Pinger
n. 聲脈沖發送器, 鈴聲定時器
??? 情景例句
We prefer to have payment in US dollars. It may be difficult for us to do so.
我們用美元付款。用人民幣支付可能有些困難。
It is better to die with honour than to live in infamy.
光榮的死勝于羞辱的生。
The police had been told that a bomb had been planted on the plane.
有人報告警察，說飛機上安放了一枚炸彈。