Spherograph
球面三角计算盘
🗣️ 情景例句
Oh, that reminds me.
噢 ，倒提醒了我。
Procrastination is the thief of time.
拖延即浪费时间。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。