Pyroarsenate
焦砷酸盐
🗣️ 情景例句
take a vacation away from the family--alone.
离开家人而单独在一起渡个假。
If things were to be done twice all would be wise.
事事倘能做两次，人人都可称明智。
There she studied the teaching of deafblind children.
在那里，她学习聋盲儿童的教学工作。