Gravisat
重力测量卫星
🗣️ 情景例句
I would prefer a non-smoking room.
我想要一间不许吸烟的房间。
The best (greatest) fish keep (swim near) the bottom.
好鱼游水底（指：有价值之物不能轻易得到）。
A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，