Electrostethoscope
电扩音听诊器
🗣️ 情景例句
the voters will have a clear choice.
投票人可以有明确的选择。
The spacecraft is scheduled to arrive at Saturn next year.
太空船预定明年到达土星。
They will also be building new roads and a special railway line.
他们还将修筑一些新的道路和一条铁路专线。