Cetrarin
冰岛衣素
🗣️ 情景例句
Well, it won't be easy.
嗯， 不很容易。
Sickness is felt, but health not at all.
疾病能够感觉到，健康全然不知晓。
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，