Echosounding
音响测深法
🗣️ 情景例句
Please sit down, Alexandra.
请坐 Alexandra。
My Biochem lectures are in the morning, and the labs are in the afternoon.
生物化学的课安排在上午，实验在下午。
Let me see your driver's license, please.
请让我看看你的驾驶执照。