Underdeterminant
子行列式
🗣️ 情景例句
Have you heard the latest?
你听说那条最新消息了吗？
What's your favorite game?
你最喜欢的游戏是什么？
riding on its air cushion over a single rail, which it never touches,at speeds up to 300 m.p.h.----the possibilities appear unlimited.
靠气垫在单轨上行驶而不接触轨道，时速可达每小时300英里。气垫船的前途是不可限量的。