Abelsonite
紫四环镍; 紫四环镍矿
🗣️ 情景例句
When I was asked to speak in English.
刚才当被要求说英语的时候。
A rainbow appears.
彩虹出现了。
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，