Polythioether
[化] 聚硫醚
🗣️ 情景例句
How big is your family?
你家有几口人？
If he doesn't, will you wash the car?
如果他不，你会洗车吗？
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。