Chelon
螯合剂
🗣️ 情景例句
Who's that?
谁呀？
First come, first served.
先来先卖。
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。