Certificating
vt. 发给证明书（certificate的现在分词形式）
🗣️ 情景例句
But?
但是？
He must needs swim that is held up by the chin.
身不由己，只得从命。
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，