Protohippus
n. [古生](原产北美现已灭种的)原马
🗣️ 情景例句
Please remain calm, sir. Just give me your name and your location.
请保持镇静，先生。告诉我你的名字和所在地点。
Burn not your house to rid it of the mouse.
投鼠忌器。
I'm planning to do a special study of satellites next term.
我计划下学期就卫星的问题做些特别的研究。