Cationite
阳离子交换剂
🗣️ 情景例句
To get ahead you'll have to work long hours and take short vacations.
要想出人头地，你必须多工作少休假。
Nothing is difficult to a man who wills.
世上无难事，只怕有心人。
With practice, no doubt, I could in time learn to write by holding the pen still while the paper moved.
毫无疑问，经过练习，我最终能够学会笔不动而纸动来写字。