Frenock
四氟丙酸钠
🗣️ 情景例句
Don't worry about it. It's a taken of my appreciation for your business, and friendship.
没关系的。这是向你表示我们在生意及友谊上的一点心意。
Hard words break no bones, fine words butter no parsnips.
粗话无害，甘言无益。
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，