Pencal
砷酸钙
🗣️ 情景例句
Is he still in his office?
他还在办公室吗？
This dress is made of silk,isn't it?
这件衣服用丝绸做的，是吗？
So she's been at this school since September?
这么说来，她自9月份才在这所学校学习？