Phthalyl
邻苯二酰, 酞酰
🗣️ 情景例句
Hail to the victors valiant,
向勇敢的胜利者致敬，
She fears Tom will drop out of school.
她担心汤姆会休学。
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。